Got my KZ AS12 yesterday.
After few hours the sound stabilized reasonably and I was enjoying them.
To me, they fit as an improved version of AS10 very well (not to replace my beloved AS10, their warm and grainy timbre ( the love from the first sound) but as a direction to improve - more extended high, more technically capable bass with two bass BAs).
Then I felt really sad for KZ that it may be a hostage of their fun base that may not approve the treble, while being into fun V-shapes, like ZS10 pro.
I really appreciate ZS10 pro (never heard such amazing sound of bass guitar recordings), but it is not my preferred signature.
I am currently happy in a sound space triangle of AS10, C16 and A10.
AS12 fits there nicely. Not as prominent highs as A10, while clearly more highs than AS10, less grainy with more capable but less overwhelming bass.
I did not feel (at least at the moment) that the resolution is much better than of A10, definitely less than of C16.
In a summary, I like AS12 a lot as a nice step in KZ tuning to my preferences (while understandably less appreciated).
Hopefully, KZ/CCA will not halt further developments in this direction.
and looking forward to C12 that I ordered few days ago
P. S. Edited for typos