This thread definitely went places.
For what it's worth, I'd mostly want to see new units that are not redundant with existing ones. So, I wouldn't want more g43/STG units for axis or more PTRS/Thompson units for allies.
IMO the commisar or the 221 is a good model (conceptually, not literally the visual game model) for new stuff in that they provide a change of functionality and give you something that is good early on and has a role in the late game as well.
I agree with that sentiment. However at the end of the day we can only suggest and few people actually have a say on what's going in and what's not.
And there's a lot of factors which go into that of course, I'm not saying somebody is calling the shots here just because they like something or not.
Things such as complexity and time of implementing something, balance, practicality, game assets and so on all go into the mix.
At least that's what I would like to think.