I for one when I started back in this hobby thought the same thing. What good are the TTC bases. I could not tweak them that well and thought they were a waste of money being put in the packs with the rookie bases.
Now I think the other way , why are rookie bases included in with the TTC bases. TTC bases are the best. They can be tweaked to do so many different things. The speed is unbelievable when you finally learn how to tweak them. Excellent running back, receivers,tight ends, Linebackers, loopers, blitzers, safties because they can spin to stay in zone converage, then straighten the dial to make a tackle on the receiver.
I know it takes alot of practice and patience to make these work. Just dont overtweak the front prongs. Light to medium squeeze and keep the figure's weight to the back of the base and you will see results.
I hardly use anything else on my teams now. But if you are not going to play in a league or you are happy with what you have , then keep doing what you do.
I for one will hardly use anything else, unless its some proline rookie bases.
But as far as the regular miggle rookie bases I very seldom use any.
Some may disagree with me here but this is what Ive found to suit my team.
Joel