DAT had a couple of good songs, mainly "Faraway" & "Starry Heavens". I just don't think her solo music is as good as DAT's, eventho it's sorta similar from the little I've heard.
Misono has never had much popularity as a solo artist. one contributing issue to her lack of popularity is that she has problems with her image. she has been on a sort of a "celebrity weight loss"-reality tv show, so it's clear that she isn't doing so well. and she's also considered "big" by japanese standards