Jan-Michael, there's been some talk in http://bugs.debian.org/620391 about Roger Router and PEAS Python2 plugins.
As upstream, are you actually aware of any Plugins for Roger that are Python 2? I'd rather see them ported to Python 3 or become deprecated than add a complicated web of additional dependencies to the Debian package. Would it be acceptable to do "sed s/python/python3/ ./libroutermanager/plugins.c" and require all python plugins to be ported to python3 from now on? FWIW, I'm not aware of any external, third-party plugins for Roger Router, irrespective of their programming language. Do they exist? Regards Rolf