there are quite a bit of changes in the prepatch to work with. then having to rework some things for every hotfix, couple times a week for the first two weeks.
with the actual release of WoD in 4 weeks, im guessing most of the work will be done, all but the dealing with the many many hotfixes following that release.
we will most likely see a working raidbot/tyreal along with Singular for combat rotation abilities only for the first couple days.
Watch for a beta version of HB in the release section. Sometimes they will release a mostly working version for those YOLO botters, use at your own risk but report any bugs, kthnks. There may not be an actual beta version for an expac release, i think i may have seen them for content patches.