I understand and welcome more alternatives to Lineage but what's wrong with their user interface? If you want to make a better Lineage, I think having built in

I understand and welcome more alternatives to Lineage but what's wrong with their user interface? If you want to make a better Lineage, I think having built in default app stores like Apkpure, encrypted system proxies, isolating apps from each other in better ways... Aren't those more worthy privacy oriented things to work on?