I had a look back at a recording of the Vincents Raheny game - Rian Mc Bride is a class act. I can only assume it is injuries held him back a bit under Cunningham, but who knows. He has it all really and must be an integral of the Dublin team this year, and preferably from midfield.
I think being anonymous is something that can happen midfielders though. The ball can be just going over your head for a lot of the game and it can be hard to get on it. There are two games that stand out for me for McBride, a minor AI QF versus a serious good Waterford team, where he was one of the best on the field and last years U21 loss to Kilkenny, where he was the best on the field.
I think he is nearly a specialist midfielder though, I am not sure anywhere else particularly suits him. As @Tayto mentions, himself and O Connell at midfield would be a top class pairing. He is a very good half forward at club level, but maybe needs to be either taller or faster for county half forward. But he is a very good tackler and very good on the ball, so ideal for midfield.