-I'd like more thoughtful puzzles that don't feel like a cookbook task (following instructions from Drake's handy notebook).
-I'd also like good boss battles. Do something different with UC4 and make well designed boss fights. The yeti thing, and final boss in UC2 consisted of literally running in a circle and blindfiring. I feel like boss battles are something that UC could add to make for some incredible moments, as most of UC memories to me are the setpieces/action. They are great, but I just want great boss battles.
-Good A.I. Personally, it feels a little cliche at this point to go into a stealth section where the enemies wander off alone, and then I take one of them out, and then the other guy says "hey? Where'd you go?" Then they all notice me. Then I somehow get into cover and escape, and the bad guys resume their lonesome patrols like nothing happened. I want that common stealth scenario improved.
-I think I'd also really like non-lethal takedowns. Sleeper holds, maybe even a tranquilizer. The context could be that Drake carries it to take down dangerous animals maybe? Truth is, I've been a little bothered with GAF talking about how much of a maniac Drake is. Hearing Drake say "See ya

" when he pushes an enemy to his death sort of creeps me out now lol
THE MULTIPLAYER
-Please, PLEASE make it more like UC2
-PLEASE make everyone start off with the same weapon, and litter pick ups all around the map. This improves gun balance and takes away the headache and pain of class loadouts that cheapen and water down the gameplay.
-Gameplay should be about map control and picking up weapons around the map, including power weapons. This makes the game competitive.
-Get rid of the horrible "MP is only played for rewards, so let's litter unlocks to keep players around".
I pray that they get rid of loadouts and bring back the unique feel of a tight set of weapons and from UC2
-I don't mind the boosters, but please don't make them upgradeable like UC2.
-Get rid of kickbacks, or at least tighten them up. Quick Boom was a pain in the ass in UC3. If you're going to make these inclusions, support both the UC2 style and UC3 style, but please get rid of loadouts.
-I don't mind a casual TDM mode with power plays and kickbacks, but I hope they don't make it a focus because the UC2 styled gameplay was much more balanced and fun
I feel like ND did a fantastic job with Last of Us MP. I've heard a good 3 times (one last night) where an Xbox guy said "wow this MP is absolutely amazing, I am so surprised". It always makes me happy because LoU MP truly was unique and the reason for this was carefully balanced gameplay and map control. UC3 was so over the top and unbalanced, sort of like MW2 where they just added a bunch of crap and made it unbalanced.
I hope they remember some of that for UC MP. Make a bunch of microtransactions for taunts and custom attires, but please don't make us pay for boosters, weapon mods, and kickbacks. UC3 felt like they were experimenting with this, especially when it went F2P, which is why I am thinking they will try their best to make the game around microtransaction opportunities.
I hope they pull a Halo 5 and get rid of loadouts and all the other junk that takes away from a game of equal footing and map control.