The two aren't necessarily linked though are they?
The ugly sister will have an advantage, a natural one based upon income which makes the league system somewhat irrelevant really.
It would take something pretty special to properly challenge them over the course of a whole season and then keep the players that did it regardless of the system. The winning of the league at present is also fairly irrelevant, it's making it worth seeing, competitiveness and attractive football and value for money, largely speaking none of which exist at the moment.
The SPL has failed. Perhaps a very simple structure as CTS says will be something that we can all start again with because all this splitting, 1 of 12, 3 of 8, 1of 16 or 14, baws.
Play offs for relegation/promotion definitely seems a good idea but we should be careful when talking about the English system as a template, aye it's relatively simple but it's also swimming in cash, at the moment.