Right, but as I was saying, if you instead change it to a power of two rather than power of four, teams will be stuck in those series even longer, as only three teams will turn over instead of five each season.
I don't believe in only two teams being relegated. I suggested 2 teams to promote. If only two teams should relegate then the size of the leagues needs to be changed as well, logically to 12 teams for each division. Then suddenly things would change a lot and I would rather suggest a factor of 3 for each division, i.e. 36 teams in second division instead of current 64 and so on.
It is not optimal with two teams promoting but that is at least something I prefer to get fewer teams at each level. It could still be important to win playoff final due to higher prize money and similar so the value of winning your division could still be there. That would of course lead to teams wanting to avoid second spot as they get punished with a smaller award.
I don't have an optimal solution and that is also why the suggestion thread is good, i.e. so that you can improve each others suggestions. I only know that I am not happy with current situation in Sweden where teams are likely to quit because there are too few challenging games.