I think that much of this discussion should be directed to the systemd-rpm-macros package. If there is some kind of agreement there that DISABLE_RESTART_ON_UPDATE should be dropped in favor of some other more explicit macro, then I would have no problems helping with that. If the current use of DISABLE_RESTART_ON_UPDATE in openvswitch package is preventing to move the discussion forward, we can replace it with '%service_del_postun -n'.