With the introduction af associations, where the team level doesnt matter and the quality is based on relative for the team on their own level, the same method could be used in CHL (and CUP).
a similar proposition was written about the cup.
But there is a major problem.
Those features (stars independent from the levels) are from new version.
The old version isn't compatible with that (so we can't play asc. games with the old game).
So this can be only if they stop the old version.
But with this, many players would stop playing the game.
Some of them because they don't like the old version and the others because they don't have the hardware to play with the new one.
It's a RAM eater, with connection problems so people who don't have systems with at least 4 GB RAM and excellent internet connection cannot follow the game.
With Unity , I don't believe things can improve a lot in the future.
So, would they risk to loose 1/3 , 1/4 of all the players of the game at once ?
I don't think so.