Corey Stoll (mobster)
I thought Corey Stoll as the mobster/brother was a total miscast and I did not really care for his story arch. At least if they took an actor who looked a little bit like a mobster, or at least intimidating.
I think the obvious choice is Bobby Cannavale especially since he worked with Woody Allen on 'Blue Jasmine', but hey, it's always easy to judge from your couch.
Loved the movie by the way.