Only issue I see with that comparison is that it doesn't take into account that this ability is on ALL of your tanks
In the past someone had suggested making it a cheap upgrade that you needed to purchase for each vehicle. I liked that idea, as long as it's not exclusive with the mg
I mean it's not like it needs to be an all or nothing thing. It could easily be only available to certain units if need be.
Alternatively we could just add like a 3 second drop time on the current smoke so it doesn't act as an autoattack shield you use after you take a shot.