Why not go for the 2 leagues of 10..........but on an equal status
Ra OF v the bottom 8 of "the 20", the next 10 (teams that finish 3rd to 12th in the SPL form that league) play a league of ten.
Winners ONLY of the 2 leagues play off for the CL spot (that'll mean only ONE of the bigot brothers), next 2 teams in each league have a 6 team round robin to qualify for any 3rd (or more) European spot.
Bottom 2 teams in each league have a 4 team play off "losing" 2 to be relegated to the pit of hell! "Winning" 2 teams swap with bottom 2 of OF league each season, gonna get humped, but gonna get OF cash games....which would you want?
Plenty late season excitement, guaranteed at least one non OF club gets a share of EUFA pot of cash.