Sorry to disturb you guys, but what really makes this thing very very powerfull is its abillity to hit on the move. It can solo a KT easily ( without sup) and I think its too powerfull since its so cheap.
Most of the tanks in the game can 'solo' a KT if you just leave it unsupported in the open and allow it to be circle strafed for 10 minutes.
Honestly, I like the E8 as it is. Relying on tank destroyers made of balsa wood during the late-game gets tiresome. It's nice to have a tank with at least some body. The T34/85 comes cheaper as far as I know and is arguably better at killing heavy armour with its ability.
Post-nerf, the elite rifle commander really isn't too bad in my opinion - if only because, with the new CD, you will typically only get a single vet rifle squad out during the early game.