That would be cool. I wouldn't mind seeing that.
It seems like they're trapped in a box. On one hand, they don't want to deplete the NXT roster as it's a selling point for the Network; on the other, the main card needs help, badly.
Last night, the main event was Reigns/Rusev. The latter was just in a dopey love triangle angle. Now, we're supposed to buy him as a Main Eventer.
Btw, you're spot on about PPVs. They need to be limited to 4 a year, but, again, those "Special Events" are another selling point for the network.