Firstly any reconstruction should always be planned a full season ahead never a knee-jerk.

Divisions same size they are now. However at the completion of 2 rounds the bottom side of each division is relegated and top of the one below is promoted. They enter the division above with the same points and stats as the club (7th place) at the top of the post split second tier. The club being relegated simply takes the position of the club they replaced.

Then towards the end of the season after the split play offs similar to now.

Just a thought.