Personally, I would love to see some tank destroyers added. There is a lot of debat as to wether or not the limited gun traverse would severly hamper their use.
What are your thoughts on this? Personally, I hardly ever traverse my turret more than is nessecary to correct my aim. I "aim" from the drivers seat, and it seems to work fairly well for me.
Also, tank destroyers such as the hetzer, jagdpazer, and jagdpanther all had thick, well sloped armor. This would increase survivability, and (IMO) offset the reduced traverse.