Okuyasu felt like Polnareff done exceedingly wrong. Both are supposed to play the dumb sidekick role, but polnareff had a very basic and elegant stand and had some wits of his own, while okuyasu had this broken ass stand and is possibly the dumbest character in any gang.
There was never a point to his character other than that final payoff vs kira and rhcp, but he botched it with rhcp, and even polny did the final boss attack better.
So, summing up, main characters and their sidekicks should nevern gt OP stands cause if they do they gotta be dumb or no fight would have tension.