One can safely say that the Pre-1250 OTU will not be rewritten with Hop Drive. It is safe to say that the Darrians were working on the theoretical bases of Hop Drive at some point, but never realized a fully functional, efficient and controllable Hop Drive. A prototype sort-of worked once at the Darrian high point, but the vessel never returned to known Darrian Space. See Cirque for details (Cirque is canon in MY mind, but I may be delusional).
And, by the way, the reason I wrote that episode of Cirque as such was to acknowledge that Hop will come, but will not be manufactured by the races in Known Space during the Golden Age. The background of the Golden age has been written. Technology that would alter Canon isn't going to be factored in, unless it's an artifact available only as a Special, Non-Reproducible Circumstance. As it is, T5 adds cloning and memory transfer, more than enough to make one question the results of the Rebellion.