Why send them back? They just take up spots on NXT which should have been filled months ago by new talent coming in.LOL'd at Mojo and Nia getting drafted. Send 'em back to NXT. Mojo sucks and Nia's green as gooseshit. And since Strowman's been split up from the Wyatts now, send his ass back to NXT, too.
Both Nia and Mojo are good enough wrestlers where they can do the finishing touches on the main roster (That people still think that Mojo stinks is one of the silliest things still going in the IWC. The guy has improved a lot). Mojo is going to be a tag worker so whatever flaws he still has is going to be nicely covered. And both Nia and Strowman are obviously going to be bodyguards to start with.
You gain nothing from sending them back to NXT because they have already done all that they were set out to do down there. They've been in developmental for 3 years. Time to move up