Such a simple solution don't know why it is isn't implemented.
Make the league be seeding of sorts for the championship.
Groups 1,2,3 and 4. Group 1 made up of teams finished 1-4 in the league. Group 2 teams 5-8. Group 3 teams 9-12. Group 4 remainder and newly promoted clubs.
Group 1 teams are drawn against group 4 teams. Group 2 vs group 3.
Also making a win worth three points would help things as well.
Make the league be seeding of sorts for the championship.
Groups 1,2,3 and 4. Group 1 made up of teams finished 1-4 in the league. Group 2 teams 5-8. Group 3 teams 9-12. Group 4 remainder and newly promoted clubs.
Group 1 teams are drawn against group 4 teams. Group 2 vs group 3.
Also making a win worth three points would help things as well.