Hi keidrych - as far as I can make out, Photon works just fine in a DCI-P3 project as it is also a RGB color space. Have you encountered any issues?
ACES is a whole different beast. We would love to tackle this though currently we are a small team with limited resources and we have to pick our battles carefully. That being said, ACES has been on our roadmap for a long time and we will definitely let you know when there is something on the horizon.