Tib/ttb may be ok for circle track if you're only turning one direction, IDK, but as soon as you start going both ways the front wants to start jacking up. Imagine scissors being the front end, and then turning left. The left side tire comes closer to the center of the truck and when you straighten out resists moving outboard again. Now imagine you're going thru a chicane or a bunch of quick left-right-left-right passing slower trucks. All of a sudden the front end is quite a bit higher and rollover is a lot more likely. This is what happened to me; a sweeping off-camber right hand corner leading into a sharper left followed immediately by a right 110 degree [damn pills-I can't think of the right term] turn....and I turned turtle. That's my theory of what happened as of now, but I could be wrong. The durability issues I agree with.
Now all that being said, the tib could be set-up to overcome a lot of the problems. My personal opinion is that it isn't the best but you must do what you can with what you got. EDIT; the more I think, if you limit travel tib could be alright on pavement.
Regardless, racing is FUN! Especially if the trucks are close in capabilities. I'm sure that is one thing we can all agree on.
Good luck,
Richard