As UK my counter to sniper involves Emplacements, especially if OH goes dual Sniper they can't do shit to my Sim city and Mortar will get em eventually, although surviving to build Sim City is another matter.
Only OKW Panther is worth getting IMHO, OH Panther is way too expansive to get and being inferior to OKW one. Also Command Panther is sick especially in team games. Mark Target + Focus Fire from all your AT and Allied Tanks just melted.
Maybe supervise should just work when Captain is in HQ sector, I once tried Captain to boost Sherman building and he end up get stuck inside pizza base, not recommended really.
The problem with COH2's VA is that most of the new DLC units are simply reused voice from other units (Pershing, Callie, Land Mattress, M3 HT, 251 HT). Same with commander abilities, COH1 VA is much more varied.