actually, re-reading your suggestion i’ve got a buff idea: making smoke explode (probably on contact) covering veteran, give speed boost + always dodging bullets (or "confuse enemies who targeted him once he left smoke) for 5 seconds for user (and make lower buff if he stays in smoke), so once he threw grenade covering his teammates he can close up with ranged enemies and use his melee to kill them, plus making him more of a threat for melee enemies in smoke, also making some use for smoke upgrades, also making it transparent
it actually makes reasonable for flamers and grenadiers to be able to look through smoke for target, maybe even make smoke targetable by them so they take their attention from team to try burning someone in smoke cloud
and, for the rest of the team, make enemies react slower on them