I somehow missed this post.
I've tried both Photon and Alexandrite for a little bit now. I didn't like Alexandrite at all tbh..
Photon feels nice and smooth and I like the customizations that are available, but it lacks a few features of the original UI that I really like. I could probably get used to using it tho if needed.
As buggy as it can be, I'll probably stick with the original UI for now and give Photon another shot at a later date.