Didn't we decide to split the suits into bits?
We (you and me) did not, at least yet
You see, too many clothes could not be split into top and bottom even in theory. So there will be top/bottom ones and undivided ones (like in sims

), which will lead to advanced coding from your side and confusing concept.
Boots and gloves should be made separately, sure.
Maybe stockings as well (I don't think that we have a eq spot for this), shoes most definite.
The problem with underwear and stockings slots is that they are quite situational. When you wear a full plate armor, they don't matter, and you probably can't even wear stockings properly (I think). Also the only way to get many icons for these slots is to render them, they are way too rare without rendering.
Stockings could be a part of boots slot though, when combined with shoes.