A question came up on the forums regarding ungrouping of elements.
https://dynamobim.org/forums/topic/ungroup-element/#post-35808
Luckily with a little Python research and great examples from Andreas Dieckman (clockwork) this is now possible with Rhythm.
This node is powerfula and dangerous, so make sure the groups you feed it are in fact the groups you want to ungroup.
Enjoy!
