I didn't know there was such a thing for some UI... AOSP should catch up quickly if you ask me... I upgraded to A14 and all I have found so far are lags and stutters, especially when minimizing apps... I hope it is only because "it is too fresh".
Would be nice for more than just small and adaptive for the basic clock. Maybe add medium and large back in? (just something I don't understand about vanilla android)
I agree with you about fixing the UI of things that appear on the lock screen that we already have, but I also remember and used these widgets back in the day and I have a use case for them.