So if you're headed to Kael'thas this week, beware. Unfortunately, Blizzard says they can't hotfix the issue, which means it'll have to be fixed in a content patch. Fortunately, however, 2.2.2 is due this week, so if Blizzard can sneak it in yet on that one, raiders will be able to take Kael on as of Tuesday. If 2.2.2 is already too far along in the process for the code to be added, however, Blizzard will either have to create a patch just for this fix (2.2.3), or wait until 2.3 releases (which could be a matter of weeks, severly hampering guild progression past Kael).
We'll have to wait and see what they do. This is a confirmed bug, so hopefully we'll see a fix for it with 2.2.2, hopefully on Tuesday.