They have no reason to change it. Uefa are only interested in the top four leagues alongside psg and not making the clubs finishing fourth have to play a qualifying round cemented that. I'm not one of these champions league should be for champions people, the champions league is a brand but uefa can't act like it's fair for half the group stage to be made up of teams from four leagues that don't have to play any qualifiers when ten teams from the leagues ranked ranked 5th to 15th have to fight for two spots in the competition and 42 domestic champions are fighting for another four places.
Previously when they still had to play qualifiers if the 4th place teams couldn't win one qualifying round with their financial advantage they didn't deserve to be in the competition. It also hurts the clubs from the smaller leagues that are in the group stage as if any of those clubs were eliminated it opened up the possibility of a weaker group or two being there to be drawn into. Now since the change there's been three groups drawn that didn't have at least two clubs from England, Spain, Italy or Germany in it and the only drama at the group stage level typically comes if three clubs from those leagues are drawn together.