Smoke grenades sound cool at first, but like everyone else said, it wouldn't really fit with AC.
Besides... iirc, the way AC works, making it so that you couldn't see past the smoke cloud would also mean you couldn't shoot through the smoke cloud... which is a very obvious problem. In addition, a smoke effect would probably look terrible, unless you made it with fancy particle effects (which really wouldn't fit with the look of AC, although it would probably look cool anyway), but that brings problems such as what Zarjio mentioned, with intense processing, and such a thing would probably inflate AC's download size, which is meant to be very small (and in some cases is a point of pride).
With all this being said, your intentions to try to improve the game is not a bad thing (despite many choosing to meet your suggestion with sarcasm and/or cynicism).
Thank you for trying :)
Besides... iirc, the way AC works, making it so that you couldn't see past the smoke cloud would also mean you couldn't shoot through the smoke cloud... which is a very obvious problem. In addition, a smoke effect would probably look terrible, unless you made it with fancy particle effects (which really wouldn't fit with the look of AC, although it would probably look cool anyway), but that brings problems such as what Zarjio mentioned, with intense processing, and such a thing would probably inflate AC's download size, which is meant to be very small (and in some cases is a point of pride).
With all this being said, your intentions to try to improve the game is not a bad thing (despite many choosing to meet your suggestion with sarcasm and/or cynicism).
Thank you for trying :)