I am happy with the pick. I guess I would have preferred if they could have traded down, got McCarthy and a bunch of additional picks, but I am not sure that scenario was ever all that realistic. Drafting QBs is risky, but a risk you simply have to take (if you don't have a QB otherwise which the Pats do not). I see Josh Allen potential (been saying from the start). Key word "potential". Has the arm, has the speed/athleticism, makes the same kinds of bad plays sometimes, trying to do too much.
He is 21, will be 22 before the start of the season. Same as McCarthy, younger than all the others. Same as Josh Allen, when he was drafted. I don't know how he is going to handle the speed of the game in the NFL. I say it half jokingly, but he has experience being on a lesser team in a competitive conference, so that may help.
The next big debate is going to be whether to start him right away or give him time to learn. I am not sure about this. I think it depends on him. You can't say, this is always better or that is always better. My sense is that he probably is not going to be ready to be an NFL starter on Sept 8th or whenever their first game is. I expect to see Brissett start the season. But if he shows that he is ready, I see no reason to wait just because.