That was the complaint/observation about Tebow the first time he was in the league after "relearning" how to throw.
There have been many talented quarterbacks who have been ruined by trying to “fix” them. And BTW many more talented quarterbacks who were overlooked because they didn’t fit the measurables. Tom Brady?
My advice for the NFL teams is that if you aren’t happy with the way the players played the game in College, then don’t draft them.