Currently we have the language-masters/en -> us/en hierarchy. however, the authors have an ongoing issue with having to update masters, roll-out to us, then go to the same page to US and then request publication. If the power user has access both over language-masters and us/en, what is a mechanism where they can have a "rollout+publish" option to be able to roll-out the page and activate a publishing workflow on us/en or any other market?
You can configure the rollout config with below options while creating the live copy of us/en from language-masters/en which will have the inheritance.
Now when you modify the content under language-masters, the copy under us/en will be updated automatically and when you publish any page under language-masters, the same copy under us/en also will get published. Now the page publish can be done either manually or it can be done via workflow as well.