Absolutely. The tank destroyer element is interesting provided its not just another tank. They were designed to be low profile, ambush weapons, so balancing their survivability with a low profile (smaller target box) and relatively fast speed in the case of the M18, Hetzer and SU-85/100 series might offer some incentive, especially if they can be tucked away in some uber-trees. In the case of the Jagdpanzer IV/L70, it carries the same gun as the Panther, so the velocity of the weapon is far more flat, providing better armor penetration. Course ppl would immediately start whining that their precious Tigers were killed by something other than an A-20 bomb**** or another Tiger.
I like the idea of providing artillery support to towns that are outside of CA range. Not all maps provide carrier ability, and there should be some other long-to-medium range option available aside from gunning them down with 110s or perimeter strikes with GVs.
I know the smoke trails are there to improve gameplay, but to be truthful, I've never seen rounds (real ones) leave trails, although I have seen some 155s leave short condensation trails immediately after firing, but those dissipate within a few seconds.
J