People have been complaining for age for panzer tactician smoke and blitz.
Churchill on the the other hand can get both of them for free with no veterancy (warspeed needs a hammer ally).
the design intended of Churchill smoke is provide cover to infantry and not the vehicle further more would allow IS to attack with not penalties...
Yes, people have been complaining for ages about panzer tactician smoke and blitz, and both of those abilities are still in game. Blitz received a nerf for panther and tiger, and a similar nerf can be apply to the warspeed if needed.
panzer tactician have been essentially the same since released. There's no reason to deny the ability to an allied unit as well.
the churchill's smoke ability sounds nice in theory, but the smoke round on the comet does a better job of providing smoke cover. In an offensive usage, you want the smoke to obstruct the enemy's firing lane, not your own.
the churchill is more about drawing enemy toward you and surviving their firepower. A defensive smoke ability would make that job much more easier.