Overall I like the concept. I think it is a much better way of covering all the possible ODTs that simply providing an official stock ODT for every possible permutation. Even just for simple stuff like the fact that there is no P3 D65 ODT in the repo. With this, making one would be easy.
I notice HLG is included under “Display EOTF”. What is the proposed ACES approach to HLG, given that as per BBC/BT.2100 spec, HLG is scene referred, with picture rendering applied by the display? This clearly doesn’t fit with the way ACES is designed to work. Do you simply treat it as display referred, and use an inverse of the HLG EOTF of the display used for grading (e.g. the “HLG Reference EOTF” from BT.2100 with Lw 1000 cd/m^2 for an X-300) making HLG “Mastering Display Referred” as Charles Poynton has always said HLG is (and I’m inclined to agree with him).