You might try CSS tricks to replace the text, but on inspection it would not be simple to target the html. This link shows the principles: Whitelabel Cheat Sheet - #17 by Ollie_Phillips
You may find that a later version of Morpheus improves the UX somewhat. For example in 7.0.3, I see leading text that states a pattern match is needed, not just the regex which is being used (as in your screenshot)
