will RMM be compatible with the empegs?

Currently it is not. Maybe someday.

are nested playlists in the works for the karma?

Currently not. Maybe someday.

how about an autosync to hard drive feature?

Not sure exactly what you mean, but I think that's supposed to be implemented already.

i didnt like the way that the current RMM for my s10 didnt allow for drag-and-drop support. is this implemented in 2.0?

There are some things you can drag and drop and others you can't. Not sure which specific thing you want to drag and drop?