Yeah at higher levels its simply a numbers game. Unless they use bot filler teams (which, as a solution, raises quite a few issues too) then someones going to get mixed draws with exactly 32 teams needed in every one.

I had thought a fix would be pulling higher level teams into own 'servers' but again that raises issues regarding the TM and over-competitiveness in the market.

No easy answer to this CL and League mixed level issue.