Just anecdotally, increasing the blur seems to have an associated performance cost, especially in Springboard ("the home screen".) It's probably only ~100ms for each interaction, so it probably won't impact latency-insensitive users.
As others have said, it helps with the legibility but Liquid Glass is still distracting and illegible. I share the wish that Apple eventually returns to a more sensible, legible UI.
> only ~100ms for each interaction
Wow.
I want to stress this isn't something I measured. There are just these noticeable lags before the sigmoidal animation starts when, e.g. opening a folder.
It's on top of the latency inherent to the animations of sliding, wiggling, wobbling, jiggling, etc. that are throughout the interface. ~100ms on top of a ~600ms input-blocking sigmoid probably just looks like a 700ms sigmoid to people.