Just a quick update to this bug: some awesome people upstream (thanks!) have taken on the effort of getting another Heimdal release out. A RC has been pushed out, and hopefully a final 7 release will follow before the end of the year.
Unfortunately, with the release schedule for Debian being what it is, the timing is far from ideal [1]. [1] The irony is that the impending removal of Heimdal from Debian highlighted the urgency for upstream of getting a release out.
