Tweening is essential to many things to us. I tried doing the all-tween thing in one of my tests and I have to say, it looks amazing. The only problem is that you're gonna have to do it right if you want it to come out right. If you look at one of Phil's recordings of FL vs. Pulse, you can clearly see that he had to do FBF first, and THEN do tween. Doing tween all by itself is almost impossible to get it right. :| Trust me, I've tried doing it and it looked horrible.