>>2050284Why have them wearing clothes at all? Okay, not really, but the swimsuits are largely imported or inspired from DOAX2 (and some from DOAX3)--which had a huge damn library of footwear too. A lot of that is reused I suspect.
Additionally, some characters--like Nyotengu (and to a lesser extent Rachel) wear tall footwear in their default costumes and would be noticeably shorter without any footwear--even back in DOA2, the series was pretty focused on hitboxes and collision detection, unlike SC, where character height rarely matters (so it's easier to duck underneath a high kick as Ayane than Tina). It'd be weird to drop a feature that's been around ~20 years.
Aside from wanting to show of character's feet, there's no reason to have them barefoot unless their actual fighting style includes bare feet (and those who do, like Zack, Mila, Rig have outfits with shoes anyway).