I too would love to see more equipment visibility toggles implemented, for boots at the very least. A character might forgo shoes for RP reasons, there’s some precedent in the NPC department (as has been pointed out, even the Queen herself goes barefoot!), and at the end of the day it’d just be another neat customisation option. What’s not to like?
I wouldn’t object at all if any kind of armour could be toggled “on” or “off” in this way for that matter, although I can see why some people might. Being able to have invisible footwear really is a quite inoffensive option though, I’d think.