I think if you changed all 10 wheels of the Turbo Tank and used all suspension/spring/shock pieces, you wouldn't be able to turn the Tank by tilting it. I really found the tank to be quite neat after waiting like a year for the stores to have them available. Pretty fun to roll around.
Oh and here's another gimmick that I didn't know about when I bought the set. The gear mechanism in the newer MTT is pretty awesome. It's a nicely simple design that functions so well. I never knew it had this feature until I bought it. Honestly, I don't think it's fun to play with at all nor is it really interesting to me, but it really adds a lot to the set instead of a boring slab of brown bricks.
I'm really eager to purchase a Republic Attack Shuttle and try out a more improved version of bomb dropping function. Older versions were rather lame i.e. the TIE Bomber, newer Y-wing, ARC-170, etc.