The real problem is the number of slots.
Just keep the current slots we have and add 8 more to fill 24 teams
The best format would be:
NA: 4 SLOTS = 2 direct slots + 1 LCQ + 1 LCQ slot from the 8 additional I suggested
EMEA: 6 SLOTS = 2 direct slots + 2 direct from the 8 additional I suggested + 1 LCQ slot + 1 LCQ slot from the 8 additional I suggested
BR/LATAM: how it already is
APAC: how it already is
We end up with 20 slots to Champs
Through seeding, make a international tournament to qualify the other 4, which in the end will have the worst seeding on the major groups stage.