I don’t know how much use he can be, on and off the field. He’s been out of football since last season, and caught just 16 balls last year for the Pats. Much of the Pats roster has changed since he was last in Foxboro.
I guess as far as tendencies and preferences he might be able to give them some insight into the Pats’ offense as a whole, but I’d guess those things would be apparent on tape as well.
Funny thing to me is that just the appearance that the Colts are trying to play some games with the Pats might give the Pats a more motivational edge than any information Branch might provide.