If you’re hoping iOS gets a massive overhaul for customisation you’re going to be disappointed, it’s unfair to say iOS is still the same since iPhone 1, samsung has gone way overboard with all their customisation, their settings page is like a never ending story book, way to much clutter that isn’t needed.
No OS is perfect but I prefer iOS over any other OS, sure you don’t get 20000 features/customisations, it’s a polished not fragmented, no bloat OS, I’ll be happy with a apple managed theme store, but don’t want 20000 different settings to clutter everything and bog down the system.
Happy with the pace apple is going at, if I ever had to leave iOS, google pixel would be my next phone, since their software, not perfect, but simplified, runs well, and works way better than the other manufactures that are using android.
Sometimes less is more and you end up with a better user experience because of it.