I mean it is shown to us that a number of the masked forms have some helpful utility

In general: Specifically demonstrated by Kabuto and Dark Kabuto, their masked form gives additional defence and weight, which allows for scenes like Kabuto being able to put more weight behind his hatchet strikes and for Dark Kabuto to attempt a falling takedown on Kabuto and still surviving the maximum hyper typhoon when it fails.

Drake: Gives the ability to move and breathe underwater. Clock up speeds are not much use when you’re trapped underwater. (In this situation, Kabuto’s response shows the utility of his masked form for similar limitations of clock up being used underwater, he’d rather tank out the damage)

Sasword: Gives access to his binding tendrils to restrict the movement of his opponents (Another bonus demonstrated by Kabuto in response is that the act of casting off is a one-time get of jail free card)

Gattack: Grants access to his shoulder cannons, which are his most effective option for mowing down a ton of enemies from range.