This is an AMAZING ROM! To the dev, EXCELLENT JOB! Thank you so much for the work you've done and are doing for this community. My OP9 sat in the box for MONTHS after I bought it bc my OP5 was still running like a champ after replacing the battery (after 3 yers! Great job OnePlus! What happened between then and now?!), and I was extremely bummed about the OOS & ColorOS merge. Still, the hardware is top-tier, so after a TON OF RESEARCH, I settled on trying this ROM first, and I'm so glad I did! Post-merge, OOS is a disaster, glitchy performance, ghost starts on ALL video players, HIGHLY INVASIVE LOGGING, and just an overall bloated experience that feels NOTHING like the OOS I was using just 2 Android releases ago. Hopefully it'll get better.
Anyway, with EvoX, the performance is amazing, I haven't found any issues thus far, and my OP9 finally feels like the premium device that it's hardware allows it to be. I especially like the subtle animation changes (although I personally like increasing the speed to 0.5, regardless of the device), and the many, MANY customization options available. Also, big shout out to the dev for putting a clear warning in the OP9 extras menu that flashing a custom kernel could break some of the functionality available in said OP9 extras; it's a small thing, but for those unfamiliar with the complexities of the process, it's an extremely valuable touch.
I haven't really used the camera much yet, so can't say much there, but quick opening to point and shoot has been solid. I believe someone mentioned a GCam in this thread that I may try, so yeah.
Anyway, hope this helps anyone on the fence who's considering giving this a shot, and BIG THANKS AGAIN TO THE DEVELOPER!