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Here you go.

There is a video on the link below explaining the whole logic of the new system.
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- There isn't going to be anything such as moving on in the Europa League by finishing in a specific position anymore.
- There is no group format in the first place.
It looks like a league with 36 teams. - Top 8 qualifies for next round directly, 9-24th placed teams play a knockout phase and the rest say goodbye to the CL.
- Everything else is the same as before - qualification rounds which are going on currently and the rounds after the league stage ends.
The move from group stage to league phase is a big move actually since big teams have a chance to be pitted against each other even from day 1 of the competition. I know we had some match-ups like this in the past format but it should be more frequent with league phase. For the league phase, I understand that teams position in their last domestic league table is used, not sure about the qualification rounds currently going on and there are mention of 4 slots with criteria I'm not too sure of on the uefa article you posted.