I believe that the extra dnf output is a no-go for general users by default (and toolbox is installed by default). It's confusing, unexpected, and sounds like an error. General users will have no idea what happened in the middle of a stable release, and how to "fix" it (it took me a while to figure out). Also, most of our users have no idea what a subscription is (there is no subscription for Fedora). It should definitely not be displayed by default, IMO. Also, it feels incorrect that toolbox modifies the default intended dnf UX.

I recommend reverting the dependency, or disabling the plugin by default, or raising a ticket with FESCo first, especially when the update targets stable releases.