Regarding limbal rings:
Personally I am very happy with the change, it's what I've been fighting for since... pretty much
October 2023.
However.
I see exactly what problems other players like duckslap, Doopliss, sleepystaccato and
especially Joralia have with the 7.1 limbal rings.
There's also something really weird going on with the conditions that make the rings glow or not glow (and potentially change their thickness too, not sure yet) depending on the lighting, weather, and environment (go see my post on the Japanese forum thread).
My personal opinion is that the method of rendering is wrong, and the way the Au ra eye shader is built is what is causing the limbal ring to appear thicker or brighter than necessary, and ultimately different than what dissatisfied people would like it to be.