When I've found myself trying to avoid normative language in situations like this I end up with statements like:
It is important that all packages support smoothe upgrades from Wheezy to Jessie , even when the system is booted with sysvinit. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org