Your probably right about Miz staying put. It's just a shame he has no shot at the Universal Title as long as he's on the same show as Reigns & Cena.
Moving Wyatt back to Smackdown is a great idea to. They could move Balor and The Club to and start a Wyatt Family vs. Club Feud. That would help ratings for sure!!! Maybe add Corbin to the Wyatt Family and then you would have Bray, Corbin, Harper, & Rowan vs. Styles, Balor, Anderson, & Gallows!!!
And Banks as the top heel of Smackdown is a no-brainer for sure!!!