When you're acting on a draft revision, we change the button text to "Submit Quietly" as a hint that your actions don't generate notifications yet.
However, this isn't accurate when one of your actions is "Request Review", which causes the revision to publish.
Allow actions to override the submit button text, and make the "Request Review" action change the button text to "Publish Revision".
The alternative change I considered was to remove the word "Quietly" in all cases.
I'm not thrilled about how complex this change is to adjust one word, but the various pieces are all fairly clean individually. I'm not sure we'll ever be able to use it for anything else, but I do suspect that the word "Quietly" was the change in D19204 with the largest effect by far (see T10000).