Totally agree. TT is limited and will always be limited--mainly by his size. Yes, he can run and the Bills have done a good job of building their offense around his strengths. The problems comes, in games like last week, where when you are forced to win with your passing game, it is just not going to be there on any consistent basis. He has had his moments as a passer (Seattle game), but he is not a consistent enough threat there--opposing teams know that and will continue to do all they can to limit the run and seek to get the Bills into a "passing needed" situation. And when that happens, the odds are against TT.
EJ has better QB tools, but his mental game has never been given time to develop--that is how it is with desperate teams/organizations--they never have the time. He was rushed into the situation before he was ready and has not recovered. I do believe, with his growing knowledge and maturity, he will be a productive NFL QB somewhere--but not in Buffalo. The confidence in him is lost by the fanbase, and most importantly, the front office. Add to that, a Head Coach who is clueless, and well, it is just never going to work.
The bottom line, next year the Bills will stick with TT--they really have no choice, unless a surprise QB becomes available.