Can't see it, to be honest, those relegated so far are the lowest supported/most isolated clubs, they haven't the financial clout to get back up, especially after the parachute payments go.
An 18 team League 2 with the bottom 2 relegated and the LL and HL champions promoted would help improve things, imo.
I got red dotted earlier on for suggesting that City would be spending a while in the Highland League, and I'm still of that opinion, although of all the ex SPFL sides I still think they are the most likely to return.