Smoke is for incompetent players that lack the skill to play at a high level. Due to their lack of skill they need things (smoke, tuning, escorts, etc) to give them more of an edge.
This badly hurts the player base.
Rehor likely knows what I am talking about here, but many of you likely will not... the lost art of dodging DB's... NOBODY can do this anymore in GB's. They pop a smoke, I wait for a few seconds till it goes away, and I bomb them... over and over. The other day a SS5 smoked rushing, did not turn, and I manual DB'd him to cries of "hacker!!!!!!" over and over, lol.
Smoke has decreased the overall skill level in NF.