Taylor has flaws in his motion, his base and his accuracy. Yes, he had a ton of yards in High School and he had a great day against OSU, but he's also made some mind-numbingly bad decisions with the football. Taylor's biggest problems are fundamental - what to do and when to do it, and mechanical - arm slot, footwork, etc.
Everything wrong with Taylor mechanically is fixable. Mentally it's a matter of reps, experience and discipline. The thing is, he's never going to turn into Graham Harrell, that's just not who/what he is. But we don't need him to be that guy, we just need him to be a net positive in the passing game. Taylor's game is running, and that's the future of this offense.
While everything wrong with Taylor mechanically is fixable, we have zero evidence that any of the mechanical problems are, in fact, even being addressed. We have no evidence that these problems are being fixed. There is no evidence of improvement in footwork, follow-through, arm motion, use of his hips... anything.
And for the poster above re: Taylor regaining his quickness or speed. So far, so no.... In the spring game he did not appear hyper quick or hyper fast. In fact, he did not appear to have progressed any from when he averaged under 2 yards per carry the 2nd half of last season. In the spring game, he again averaged under 2 yards per carry.
Knapp... you are correct, without passing improvement or getting his quicks back (and, so far, there is no indication that either is even moving in the right direction), TMart becomes rather... pedestrian. Or worse.