Nice one! Was planning on making this one myself, but won't bother anymore
Another extra cp-feature I had in mind was 'add template to all template sets' which will add your new template to all sets in one click
And I'm working on a template compare utitility which will check two the same template of two different template sets against eachother and lists the differences of the $var variables.
But first I've to release the vbextern hack