Actual changes besides color probably won't happen. I will look into attempting to get all the border elements changed according to the style. I only modified the ones already included in the DrumsUI files, so I'll have to figure out which default images affect said windows and patch them as well.
Unfortunately it's mostly controlled by several graphics files, rather than code, and since no one else (but a few) ever took time to figure out how to modify them/submit them... I've been the one doing the editing and I'm not great at it nor enjoy it