Would he be a bonafide home run like (in my opinion) Brady or Briles? Maybe not for the exact reason you mentioned. But let's not consider him trash - he's got an impressive resume and relates to QBs very well - **** he's the best option for TVD's continued development for sure, so there's that.
I'd imagine Dorsey implements air raid concepts similar to what is going on right now with the Bills - lots of 4 and 5 WR sets with short passes being a de-facto part of the run game. Get the ball to your skilled, speedy position players (McKenzie, Gabriel, Sanders, Diggs, Knox) and let them go to work.