Well, since this thread got bumped...
Arlo, I wanted an M4 for a long time. I was kinda hoping for different versions' of it though. Like an early M4A1, or a later M4A3E8, A "jumbo", a regular M4A1 with a "Calliope" rocket launcher, the 105mm. gunned assault version, etc.
The Firefly was almost anti-climactic; It did have a 17-pounder, which was a British invention, But in an American tank, Splits' it between the UK/US. Would have been neater to see something like a seperate Comet or Cromwell, and a regular U.S. style sherman. That way each country woulda had a dedicated AFV.
I'd like to emphasize, though, that early war and Mid war AFV's of all types' would be great to have in this game. Sorely lacking, in fact. The earliest AFV of any sort that we have, is probably the M3, which started to enter service sometime in 1940; But the gap between that, and the T-34 we have (Which by the turret design, is a 1942 or 43 model, I believe) is quite great; and also, it is only a halftrack.
Any early AFV's would make the EW and MW arena's much more playable, as well.