So everything works now.
Internet is provided through wired CCK which is connected to router and SWS switch, which lead back to receivers.
I didn't use Decas from old HR23 setup, simply Coax in to Satellite input on HR44 and HR24s, simpler and cleaner.
MRV authorization message was there shortly after activating new receivers but it turns out I didn't share my list on the HR44 properly and with on Demand, it would give me an error whenever I accessed any of the channels but the next day it worked. I'm guessing it needed to build the on demand channel content before letting me access it.