For those who are wondering, I just tested the APP/+ new firmware [v1.8-8.83] with my Nikon Z6II.
Same as described months ago: Extremely slow, menus get stuck when you connect the camera. You still have to wait a long time before it actually start taking the image. In short: they haven't fixed anything !!!
After almost 3 years using DSLR with the ASIAIR, my understanding is that ZWO is tricking its customers into letting them buy the AAP/+ only to find that it doesn't support advertised DSLR. Some of them, unable to wait for an hypothetical update, will end up buying a ZWO camera. Well thought !