I don't know who made these captain bonuses but they're not balanced at all.
Walker gives your team +1 ACC
Smith's big bonus is +1 AWR
Gilligan's big bonus? +1 COD
Never mind the fact that with 6 pieces it turns Walker into a towering colossus in the middle of your defense who can run like a gazelle and jump like Michael Jordan cira 1996.
It also makes Night Train a literal God in the game.
I thought one captain would get a SPD boost, another would get ACC, and the last would get a few bonuses because the rest aren't as important.
Instead, Walker gives everyone more acceleration and the others give short route running and knitting.
Why would you even choose the other two captains?