Yes, I'd love to see this resolved.
Currently the only "official" solution is to have the original organizer cancel the meeting, and someone else send out new invites.
But if you look at the links in my comment in the bug, and also at
Bug 64095 – forwarded invite supersedes original, these suggest you might be able to hand-craft a new invitation and send that out, with a new organizer. You'll probably have to use zmlmtpinject from the CLI to send it.
The hand-crafted invite would probably have to be both a .ics attachment and the email itself--if you just enclose a .ics file, that's probably not enough, since it won't have the right MIME-type (text/calendar).
Another strategy (low-tech):
Right-click on the meeting and choose "create a copy". This lets you create a new version of the meeting with you as the organizer.
Drawback: it doesn't cancel or replace the original meeting.