I'd call the Amazon a definite improvement. I don't even know what's going on with the stuff on her thighs and abdomen in the original design, and the new muscular bottom-heavy body shape is much more distinct from the other classes. Sure she's wearing less, but at least her skimpy clothing in the new design fits a general barbarian theme (outside the metal greaves).I don't know if it counts but... I would say Dragon's Crown. Look :
Left : Unreleased dreamcast version
Right : PS3/Vita version
The Sorceress... Eh, the new design might look ridiculous but at least it has more character. Plus no high heels.