Not a Pats fan but watch a lot of the games, including the entire Jags game. Here's my somewhat unbiased take that means absolutely nothing:
Pats have two major concerns as I saw it. They have no one that can really take the top off the defense and their corners are bad. Jags just attacked whoever the weak CB matchup was all day. Offensively, if you have to line Gronk up against a lockdown corner you're gonna have a bad time. The Jags were doubling him all game. Edelman is getting older and not all that great in my eyes and there's no one to make defenses respect the outside. Dorsett has speed but he's 5'10". He's not the deep threat you're looking for. JG is under 1 million dollars and you get a pick swap back if he doesn't play ten games, a 7th for a 5th. The fact is he has elite speed, is 6'3" ,and might pan out, well it's the ultimate low cost lotto ticket imo.
He could still catch as of last year:
And he can still catch this year:
Maybe he only plays a few games and relapses. Maybe his season is mired in injury all year. But it fits a need for you with minimal risk.