TT has not "regressed". he is the exact same qb as he was last year when he was ranked 7th in passer rating & total qbr.
what is different is the players NOT around him....last years #1, #2 & #3 WR's, #1 center, #1 RT and at times #1 & #2 RB, #1 TE and just as important his O coordinator ...to some these are facts, to others just excuses.
last year TT was near leading the league in deep throws, mostly to Sammy.
you replace TT with any young QB who has "upside" on this years team....and our record is 2-10 instead of 6-6. if we had a Top 5-10 defense, our record this year is more likely 9-3. I agree with everyone that TT is not going to win us games with his arm, just be careful what you wish for, it so easy to do a lot worse.