Mst people petitioned for it to drain faster, but for some reason EA/Crytek have ignored this majority and instead nerfed it to 15m distance with the same drain speed.
Personally I think nanovision should be at the same distance as in the demo, but with a far faster drain speed. If people want to be stealthy they can take the module that stops them from showing up as brightly in nanovision.
The changes have ruined the dynamism of the gameplay which made the demo so fun.
All the great fps Counter Strike/COD4 Promod are good and not frustrating because they have good visibility.
Currently somebody can be stood in camo 20m away from you and 99% of the time there is no way of detecting them because nanovision simply does not extend that far.
This also makes guns like the SCAR seem overpowered, because people camp in camo now until somebody gets close enough to guarantee a kill.
Personally im finding the multiplayer to be far less fun than the demo was and I really dont think Crytek/EA appreciate how much this change has affected gameplay.
I cannot see Crysis 2 multiplayer having lasting appeal for me, because it is now mostly camp/luck based, which means, like black ops, it is fun for a short while but then just becomes too frustrating/boring to play.
I really hope that at the VERY LEAST there is an option for servers to enable nanovision back to the demo distance but with a faster drain speed.