first of all i think the game is fun to play but there ubisoft should have been implement some few more things to make the gameplay greater.
here are some of the things that should have been in the game.. If not in all difficulties, then it should be in advance or extreme mode for hardcore gamer.

- when sniping from the distance of more than 200-250m, you should get extra XP for killing an NPC

- Camo stats for some of the clothing.

- NPC should hear the sound of the gun when unsuppressed up to 250-400 meter, it will make the stealth game more fun.
at the moment when u r shooting a gun unsuppressed from 130 meter away, the NPC won't notice u at all and I'm playing the game in Extreme mode.

- in expert mode, when proning aside to an NPC they still don't notice u, should be fixed.

- The AI should be more like in the divison.. Using he environment, trying to surround u, just being more clever.

- NPC should be more aware of the surrounding, like when one of them has been killed when near them or something.

- the harder the difficulty the more XP u get

- knife throwing should be added ?

- make the advance and expert NPC more clever, better line of sight, heavier armed.