I've filed bug reports against all reverse dependencies (normal severity for now), tracked using the gtk2-removal usertag:
https://udd.debian.org/cgi-bin/bts-usertags.cgi?tag=gtk2-removal&user=debian-perl%40lists.debian.org All reverse dependencies are leaf packages. The vast majority are either dead upstream, or orphaned in Debian, or de facto unmaintained… or, pretty often, some combination thereof.
