No his main strength coming out was his accuracy and ability to hit guys in stride. It has been the opposite in the NFL as he rarely hits guys in stride. He was also noted to be poised, decisive and able to process the whole field which again are things he has struggled with at times in the NFL.
His short ball accuracy is still there, mostly. The issue is the deep ball/intermediate never improved. Which was a weakness, and thats the biggest ?? he still has. Not reading defenses, imo, because if he was incapable of reading them then he'd be throwing MUCH more interceptions.
His biggest strength that became a weakness from college is eyeing the safety and knowing where he wants to go with the ball before the snap. I feel like too many teams exploit that on mitch this year. EVERY QB does it, brady is excellent at it(eliminating half the field based on the coverage look you get, get the ball out fast). Mitch has just been either reading/guessing wrong, or just making a poor throw. I watched a lot of him in college and that never was really an issue. Guess the NFL figured him out.
Thats why I never had an issue when people say he stares down his #1 option(Arob). Every QB does that shit, if you think you have an excellent matchup at the snap you're going to give your guy every opportunity for it. Mitch just takes it to a new level at times, which is unfortunate. The last couple of games he's been much better at it. Hopefully it continues.