-Remove Listen Mode
Seriously, the game just feels so much better without the Listen Mode. Enemies sneaking up behind you can actually happen and it always felt really awesome. The only problem was Listen mode was only disabled in Survivor and Grounded, and that kinda sucked due to the increased damage you took in those modes. I feel like Hard without listen mode would be ideal for a first time play through of TLOU2.
And for those who will say "just don't use it", then there is literally a wasted button on the controller. I'd rather a mechanic that added to the game like a whisper or attract move (so you bring enemies towards you instead of away like with bottles) could add something by spliting up some groups of enemies
-Multi-faction combat
These were a cool thing in Left Behind, although it did look a bit janky. I would like ND to expand on this, since the idea of luring infected to the hunters by chucking a bottle at them to force a fight between them is really cool. Also, I hope they can make the AI actually still fight each other and not all focus on you. It is extremely annoying when I am fighting an enemy in FF15 and the magitech soldiers drop in on me, and everything just decides "fuck it, lets conspire against man".
-A deeper crafting system/more options
This can go either way as it might clog up the crafting system, but I would like more options to create more tools to help in combat, or for you to add modifiers to them. Also, have there be more options to deal with infected. Its a waste to use shivs on clickers because shiv doors are a thing. So basically sneak by them, use arrows, or burn em. Those were your only options. I'd like a bit more.
-Please don't have the "liar revealed" plot line be a part of this games narrative
I really don't want to have to sit through a section of a game where Ellie learns that Joel lied to her at the end of the first game, and we have to sit through the fallout of that. I fucking hate this trope in almost every medium it is used, because the story flow always screeches to a halt. In fact never bring up the end of the first game in the second, or if they are going to do it, have Joel die before Ellie learns the truth so I don't have to deal with the fall back. I straight up don't like this trope, and it sucks. At least if Joel dies, there is no conflict that can arise with Ellie and Joel so the story can move on.
Oh...
AND ELLIE BETTER KNOW HOW TO SWIM NOW