Let me start off by saying that the main reason I purchased Crysis 2 on Steam was due to the awesome fun I had with the multiplayer demo.
Since the multiplayer demo I've noticed there's a huge difference in the Nanovision in the retail version of the game.
Nano vision was very useful during the demo and one could see very far enemies that were uncloaked, while cloaked enemies were harder to spot from a distance and had to be approached closer to be visible (blue aura)
Now with the full release, I've experience that the both the visible distance with nanovison for cloaked/uncloaked enemies has been shortened dramatically. So much so that's it's been rendered damn near useless. This is a problem, either bring back the original nanovision or get rid of it altogether (which is even worse, dare I say) By the time You can see the enemy in nanovision its too late and You're probably dead, thanks Crytek.
Also another problem is with the thousands of people (including myself) who haven't been able to redeem our LE bundle codes, which is now useless. The code was supposed to increase our rank to 5, but my rank was already 7 by the time I was able to activate it and after activation it remained unchanged.
What the code SHOULD have done is RAISE the rank by 5 not to 5. Thanks again CryTek . . .

In other news, why the hell are does my xp/rank increase in unranked servers but doesn't provide unlocks?
I was rank 7 before I realized that I wasn't getting unlocks due to me unknowingly having been playing unranked servers. And now I have to make the slow death grind to get basic unlocks for weapons/stealth/armor, . . . so it goes. I would rather have not "ranked up" at all while playing unranked severs, at least that would have been a clue that I was wasting my goddamn time, Thanks Crytek.
This brings me to the other issue of ranked servers not connecting AT ALL. All day yesterday and most of today was wasted trying to connect to ranked servers without success. Today I discovered that the only servers that ARE ranked and connecting to matches are those not "connected" to EA.
Basically look for ranked servers without the EA logo to the left of the menu.

These are all personal complaints and I assume in the eyes of CryTek completely irrelevant and of no consequence, yet I felt the need to voice my concerns here.
There it is and if You feel You have some other complaints, grievances or disappointments to add, please feel free to voice them here . . . . now if You'll excuse me I have to go back to my crap account and try to raise my level to something more reasonable/playable while warding off kids without full time jobs with rank 30 and their newly unlocked death ray . . .

yeah i used to wreck with nanovision and i was wondering why i was getting raqed now. nano vision is very useless now. just get the thing that makes cloaked people red on your non nano vision display. svcks cuz nano vision was rad.

also i think 8v8 svcks on some maps. people bich about getting it and it kinda ruins some maps (skyline, terminal). 8v8 works pefectly on the bigger maps like sanctuary but skyline (my favorite map) is now way too saturated. youd otn have time to do cool stuff like scout around and actuallyuse the suit...its just spawn, scan, shoot, spawn, scan, shoot. and if youre in a fight its likly vs 3 guys and if its not then you can almost guarantee someone will pop up behind you soon.

Indeed, thank You for the comment.

Noticed the reduced nanovision range as well, seems to be about 20-30m now (rather than as far as you could see). Possibly done to reduce the effectiveness of snipers, on some maps 2 snipers could control the whole map (not just pier, that lighthouse one as well). Buuuut then again considering how buggy this release is, it could just be a bug.

Not that i personally lament the demise of nanovision (its still useful in building clearance), i hit rank10 before i figured out how to turn it on in the demo, and I always thought it was dumb spending all your time in fugly gfx mode. Stop camping, grab a shottie and go slide kick some germans (who apparently have the only working ranked servers.)

Nano vision was so overpowered in the demo that you were f'ed if you didn't use it all the time.

I like it the way it is now.

Glad nano-vision was nerfed. It's only people like you OP that are crying because you can't spam it and own all the other players that don't do the same.