Thanks for your feedback!
After I got a lot of positive responses from different stakeholders I now contacted Yabapmatt directly to see where he stands on the matter and if he'd be willing to spare some dev time to make changes. If so, we can start working on the exact formula.
I do agree that it won't be super easy to explain how it exactly works but as you already said, most people won't understand how it's working right now either, so that shouldn't be an issue.
Regarding the relegation system - it certainly would need a lot of work and there are many questions that would have to be answered first. I still hope we'll see Brawl 2.0 eventually with a new system... that might be something for 2025 or later, though ;-)