The consensus of the group was that the “ACES badged” version should be fixed. This makes tracking simpler, as it needs to be applied in the same way on set, in dailies, in VFX and in DI.
If you want to use it in grading as a creative tool, there will be a parameterised version available (and obviously the DCTLs of the earlier iterations still exist). But that will not be the ACES gamut compressor. It’s just another tool in the colourist’s arsenal, just as none of the other grading operators you use are “ACES tools”.