Hello.
I’m a little bit concerned by this opencore switch.
We distribute OpenNebula in turn-key solution for french schools and all
this make me think that we couldn’t distribute OpenNebula anymore. Our
Ubuntu derivative is publicly available and we need the migrators for
our users but they are not libre anymore.
I’m sad that you are in a situation where you need to make that choice
but this seems to us that it’s the end of this wonderful story 
Regards.