Glad to hear the endpoint/tape functionality will be fixed! I agree that the tape job should be more important than the endpoint job. In an ideal world, it would simply tell the tape job to put the endpoint backup to the end of the list, and try it again before it finishes the job.
As for the "almost continuous" GFS, I've seen nothing of the sort. My active full jobs ran on Friday, the GFS job didn't start until Saturday. I manually stopped the GFS job Saturday night because it was using the wrong tapes (different forum thread on that subject) and it sat doing nothing. I did not disable the GFS tape job, I merely stopped it.
With the previous jobs, if it was set to continuous (which I find faster to write than "as new backup files appear", hopefully this doesn't cause misunderstandings) it would try, and try, and try, and try. On days where there was a persistent issue I'd generally get 40-60 or so emails from the B&R server over the course of the night. Unless it was stopped, then it went straight to disabled. If a full active job ran, as soon as it was finished, the tape job would start putting the VIB/VBK to tape.