Yep Frankie may not have gone to university but was smart enough to be a Capo of the corleone regime and a figure head in New york. He was probably street wise too. The only problem was that Mike and Roth were much smarter and had much more power then Frankie, they pulled the strings and as DC said Mike left Frankie out of the cold, so Frankie didnt know what was going on.

The only thing Frankie cared about was nailing the Rosoto Brothers but things didnt work out that way as Roth had other confusing plans.

Frankie was smart just not as smart as the the big guns.