Nothing wrong with that. Keeps the hitter's guessing. Yes and no. Having that many pitches can cause some issues in execution. I wouldn't think there would be too many nights where he would have control of each and every one of those. Maybe he would be more effective if he cut some of those out and focused on 3-4 of them, perfecting them as much as possible. As far as keeping hitter guessing, it is really a matter of fastball vs. offspeed. You recognize offspeed that it can be anything from a changeup, curveball, slider, etc. I don't think you can guess curveball, slider, etc. You can key off of offspeed vs fastball though, including cutters. Thats Weaver style though. Thats what got him into the big leagues. I dont have a problem with throwing so many pitches at different arm angles. Develop your own style. If you look at all the pitchers in the major leagues, none throws exactly the same way.