I like Oblivion's style just because it seems perfect to me. They strongly resemble animals, but also strongly resemble humans. I don't like the huge feet they had in Morrowind and I hate how it's almost demeaning to them. They are beast races, but they are very intelligent and very human-like in personality, so I like them to look like they are intelligent and human-like.
I find the notion that a character can't be intelligent and "human-like" without actually looking human in appearance far more demeaning. In Morrowind, despite some Dunmer who would tell you otherwise, they never felt any less intelligent than the other races, if anything, their less human appearance made them stand out more, giving them a small amount more character, making them seem a bit more like actual character rather than mindless information terminals that happen to peak and are human shaped. It still didn't make much difference, of course, since mostly they still had the same boring things to say, but it helped a bit.
And in any case, the races could do with a bit more to distinguish them visually anyway, going back to a design closer to Morrowind for Khajiit and Argonians would just help to accomplish that, so that is what I want to see. boots and helms don't have any effect on it, in any case, in Morrowind, modders were able to remedy the boot thing, and as far as helmets go, it's not like they couldn't wear helmets, they just couldn't wear
full helms, so if there are just more open helms, it won't be a problem, and Bethesda still let them wear full helms in Oblivion, though the parts that would effect helmets didn't actually change much between Morrowind and Oblivion.
At the very least, though, Bethesda NEEDS to bring back the claws, not having them doesn't even make sense, many Khajiit are said to forego weapons in favor of their claws, how do you do that when you don't
have any claws?