First of all I am going to speak about the GUNS.
I personally think the guns are fine the way they are, obviously I would still like to seem some new guns the Crysis but I don't mind them the way they are.

MAPS.
I also like the maps the way they are, there's not a single map on Crysis that I can honestly say "wow this is a piece S***" But of course there are maps that I don't favour as much as others. I hope you don't change the art style of the multiplayer maps too much, I say that because Crysis 3 is going to be set in a jungle/urban place, which I don't really mind when it comes to singleplayer, but I just hope the multiplayer is not just filled with a bunch of jungle maps (just my personal opinion)

MODULES.
I think the balance of individual modules in Crysis 2 is perfect, its just that as we all know when energy transfer, mobility enhance, and stealth enhance was just OP, i hope you nerf the effects of all three of them, or you make more modules that can be set up in ways that can be just as good as the E.T M.E S.E set up is.

KILLSTREAKS
With kill streaks in Crysis can you please please please for the love of god add a higher streak, when you first play Crysis 3 5 7 is enough but when you play it more more and more, and keep getting them every single match they get boring. A couple of ideas for kill streaks could be lets say an 11 kill streak is a ceph gunship that has weaker bullets or what ever you call what it shoots, but your inside it and control it. or a 12 kill streak and its a maximum nanosuit that has lower health than the one in Crysis 2 or even a 25-30 kill streak and you get the pinger the big robotic alien in the Crysis 2 story mode (if they are still in Crysis 3) These are just suggestions.

THE OBVIOUS
Then obviously just stuff like fixing all the glitches you can before release would be nice.

I made this thread so we can all talk about the things we would like to see in Crysis 3, and hopefully Crytek picks up on a few of them. so feel free to speak about what you would like and also feel free to speak about the things that i have suggested and tell me while you think that they would be bad ideas if that's what you think.