You actually think there wouldn't be a track differential of some kind added with GVs using rotationless turrets? The TD turret guns sound like they packed an above average punch, and the speed would make mobility an adequate counter balance to light armor. T34s are already fast enough to throw off about 2/3s or 3/4s of players' aim. 60mph would put it on par with the M8, which is definitely a ($#@ to hit. Add an above average main gun and it will see plenty of use. The only true vulnerability would be A2G fire.
The terrain shortcomings of the game are a factor but not nearly enough to make something like an M18 unviable.
Re-read my post. You seem to have it out for me as of late and you're doing your best to get into an argument. "a track differential of some kind for turretless TD's"??? You're making some very broad statements about "TD guns sound like they packed an above average punch", etc, "speed and mobility", etc... the issue isnt the M18's gun, mobility, or speed. The issue is turret-less TD's. btw... the M18's gun was the 76mm which is less powerful than the Brit 17lb'er, and more powerful than the German Pzr 4 75mm (comparable, iirc), M4A1 Sherman 75mm, and T34/76mm. The M18 would bring speed WITH firepower to the game.
The current track model does not allow a tank to sit in one place and pivot, hence if one is behind cover in a turret-less TD two bad things happen: first, you must move forward or back (that requires a running engine so there goes the element of surprise) to traverse the gun further than the 15-20 degrees that requires a running engine. Secondly, by moving you could very well A> take your target ot of sight of the gun due to being below the mound/bunker, etc or B> move forard and become canted on the mound and still not get a shot due to being too high, etc. It must move forward or reverse to turn the body of the tank. Unless that model is corrected, the turretless TD's are sitting ducks and they will be left behind in the hanger for teh Firefly. If a TD is going to be introduced, I would highly suggest it have a turret (M10,M18, etc). Do you really think HTC is going to change the 5 other tanks in order to add the StuG, Jgdpzr IV, or other such turret-less TD? I doubt it. They'll continue with the model they have and as such the turretless TD's will be at that much more disadvantaged.