I think it's safe to say that DEM and CHiE are no longer releasing any new music.
For DEM, I think Fivesta was a one album project. Looks like we'll have to follow jyA-Me since she's the only one that's going to be releasing music.
CHiE has obviously been dropped. Her name is not on the Universal Japan website, her latest blog post was in 2011, and her staff twitter account is gone. Although her website still exists, I have a feeling that her staff just gave up on her.