A metapackage would definately work and it would be a great way to keep a distribution updated, but I was assuming (possibly wrongly?) that the package list would already have multiple metapackages. Either way, the redundancy definitely wouldn't hurt anything. I think, if you already had deblet installed, the metapackage would be the easiest choice. If you weren't sure how to install deblet, a script/set of scripts to get deblet set up would be the best way to go. Unfortunately, I'm not too good at making scripts, but I think it is even possible for a script to ask you about partition changes and then call on another script or program to make those changes.