What I would recommend to do is to forward your diff it is to Debian and update the merge request to drop unrequired changes, fixes are fine to keep (i.e the maintainer script tokens or watch fixes) but changing the source format in an Ubuntu specific way doesn't seem a good idea
You also don't need to list the maintainer update in the changelog that's something we do for each source we modify in Ubuntu
What I would recommend to do is to forward your diff it is to Debian and update the merge request to drop unrequired changes, fixes are fine to keep (i.e the maintainer script tokens or watch fixes) but changing the source format in an Ubuntu specific way doesn't seem a good idea
You also don't need to list the maintainer update in the changelog that's something we do for each source we modify in Ubuntu