Trying it out, loving the editor improvements from stable -> dev#4 so far, except one time when I opened the properties window it got stuck open and I could not close it.
The line indicating which object you are updating the properties of is a really nice touch.

Hold and drag hit power control seems like an unfair advantage to enable however...

Private game multiplayer is broke. Friend and I tried, and yes we were both in dev build, and the workshop course just wouldn't load - stuck on loading screen - would have to force quit game.

Also game just kept freezing for him - he will repurchase when we are able to play online.