I absolutely agree with you both, Rafa has already strengthened the Liverpool youths, he's bought in a host of players that have potential, Francisco Duran, Emiliano Insua, Jordy Brouwer, Sebastian Leto, Danielle Padelli and a few more.
In my opinion, the several factors of the Liverpool squad that should be improved:
Goalkeeping: Reina is still one of my favourite keepers, and I think he is better than Carson. He is also young at 24, and has a lot of potential. Most goalkeepers reach their full potential when they're older. I however think that we should get rid of Dudek and bring in a better 2nd choice goalkeeper, Danielle Padelli is not quite there yet and I think would need a year out on loan. I would love for Scott Carson to be brought back from loan but he craves first team football, so I can see us selling him next year as Rafa won't replace Reina unless he fumbles for the rest of the season.
Defence: I think we need to get rid of Sami Hyypia and get another CB, but Daniel Agger has very much impressed me this season and he can go on to being one of the best defenders in the premiership, he just needs to play more. Carragher for me right now is irreplacable, and Gabriel Palleta has much to learn, so we could benefit by loaning him for a couple of seasons. We'd need a big strong CB, and experienced, Carragher is experienced and we really benefit from that. There have been talks that we're interested in Anton Ferdinand - NO THANKS, he is no way good enough for West Ham, let alone Liverpool.
I think on the right of our defense, we're pretty good, we've got a good experienced player in Finnan, and also our new signing Alvaro Arbeloa proved that he's good enough with that performance against Barcelona at Nou Camp.
The left is a different matter entirely, Riise is not a good enough defender in my opinion and is form lately has not been very good. Fabio Aurelio is also capable of playing on the left of defense too but I've not seen him play much in that position. We really need a left sided defender, but I've no idea who though.
Midfield: Our midfield has to be one of the best in the premiership, but we really lack creativity at times and that's something we have to work on. I also don't see Gerrard going forward with pace as much as before and our tempo needs to work faster and we have to create more.
We have too many players in CM, it's already congested, so we don't need any more in that position, but we should get rid of Bolo Zenden as he's not done much for us besides being cover. We have Mohammed Sissoko (who I believe in a few years will be brilliant, as of right now, he has a lot to learn, his passing is downright dreadful but his determination & energy levels are through the roof), Steven Gerrard (who I feel should NEVER play on the right, it's simple the wrong position for him), Javier Mascherano (has yet to prove himself but could be a pivotal signing if he provides us with the creative spark that we need sometimes), Xabi Alonso (one of my favourite players, his passing is second to none and he's helped us out so much), which I feel is more than sufficient enough in that position. But we could benefit by getting an attacking midfield whether it's centre, right or left.
On the left of midfield is where one of our biggest problems lies, Riise, nor Gonzalez (who I believe needs a couple of seasons on loan to get where he wants to be as he isn't good enough yet) have really fullfilled this role to well. We need someone pacey and someone who can take on players AND provide us with good crosses. I thought Aurelio did well in that position on Saturday, only his crosses were not good enough. Preferably I'd like Liverpool to sign someone like Simao Sabrosa or Pedersen or Robinho for that position. Sebastian Leto in a few years could really be good for this position, so could Mark Gonzalez but right now he is nowhere near good enough for it. I also forgot that we're getting both Luis Garcia (who is really creative for us and sorely missed) and Harry Kewell back next season, which should also provide us cover and more creativity on that side.
On the right, it's not as bad as left, but it still needs improving. Now I'm a fan of Jermaine Pennant, he's doing well for us but he still has a bit to learn so he's not quite there yet, but his improvement has been quite remarkable this season. At the beginning, he was complacent and not good enough but now he's like a different player entirely. Steven Gerrard simply should not be in this position. I would love someone like Daniel Alves for this position.
Set pieces is another problem, we had over 10 corners on Saturday alone, our set pieces are not good enough and if it were any other big team, they would have made more out of it. That's something that needs to improve thoroughly.
Overall, our midfield needs improvement but it has a very good core.
Forward: Now here is where our biggest problem lie. We simply do not have that killer instinct, that 30-a-season goalscorer. We need to fork cash to buy a world class striker for this position. It's where we have had most of our problems.
Kuyt is a great, and technical player, he works so hard and links up well, his dribbling is not very good but he can score a lot of he wants to. This is his first season and it's the adaptation period, I fully expect him to play better next season. He scored a sufficient amount in Netherlands.
Craig Bellamy, is a striker that we need to keep, regardless of all the press he's been getting. He's pacey and he works very hard, but he just does not have that finishing touch. He has missed countless chances for us, but I still say we should keep him because he links up with the team so well.
Peter Crouch on the other hand, I believe we should get rid of him, he has scored, but he has been very inconsistent for us and I just don't think he's good enough. He is determined but he is very sloppy, and messes up some killer chances.
Robbie Fowler, despite being a very influential player in our team is way passed it, and the only thing that remains from him is his finishing, if only, like Rafa says, we could have someone with Bellamy's pace and workrate & Fowler's finishing. I just don't think we need Fowler anymore, he's very slow and sometimes drags the team down.
We are bringing in Andrei Voronin from Bayer Leverkusen in the summer, but he is another squad player, I don't expect he will be getting much first-team football but he is a hard worker. He also can work in a midfield position.
I think Liverpool need a top class signing, like Samuel Eto'o, David Villa or Fernando Torres. But whoever we sign from abroad will need to adapt to the Premiership which could take a while. Or we could simply sign a striker from the Premiership, someone who has already adapted to the style of the league. It's really up to Rafa where he goes with it.
Overall: I believe if that we fix these things, we can go on and win the title. I honestly believe this. We need to make these pivotal signings to enhance our squad which is great at the core. I also believe that if we are to win the premiership, Rafa needs to sink his rotational policy.
Dunno what team Koeman wil field now. Probably something like this:
Man Utd "won" 
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