To give it a wider audience they could have a "Rugby" channel that shows both Union and league
I can see that going down like the proverbial lead balloon with the League mob! It'll be branded as a plot to denigrate the "Greatest Game"
by the Establishment, the AhEffYou, The Vichy Government, the Illuminati, Lizard Overloads, Xenu, etc...
More seriously, it would be harder to arrange the live games during the overlapping of the seasons of both codes.
The main frustration for me is that the games aren’t uploaded until (usually) the Monday. For games played on a Friday night, that’s an annoyingly long wait imo.
Probably part of the deal with BT & C5 that they aren't allowed to post the full game until after the highlights show has been aired.