My idea:
Loadouts that only save a certain aspect. Such as a weapon set, armour set, and costume set. That way you could mix and match easier. Choose your weapon set, then the gear, and then the costume you want ontop of that. It would create an easier variety with more flexibility instead of having to save every single combination of weapons, armour, and costumes. Trinkets would either fit into the weapons set or the gear set.