Hi, I'm sorry I have no idea on the timeline but you should probably look into generating proofs from the documents ASAP. We are heavy users of PHQ, and it is the product that brought us to Workfront.. saying that we exclusively use it via generated proofs in individual projects.. I am the only one that ever goes into PHQ. I am surprised that it is still available via the menu at all, the only time I ever need to go in there is when I have to delete a misspelled / wrong proofer.
Are you willing to share some info about your workflow? How are your projects and proofs related to each other? I am assuming you use Workfront, what has kept you from integrating PHQ to a greater degree? What is the drawback to using it the way it is intended to be used (now)?