they need to scrap both then run two competitions:
A knock-out Euro cup comprising all eligible for current CL and Europa, with appropriate seeding and byes.
Then a smaller European Champions League with an actual league format with only the top 2 teams from major nations and top team from second tier, previous season's winner, and top two of the cup competition.
Have the CL actually be a league with quality for once, not some daft competition winnable by jammy chavs and diving scouse