Lars,
That was a choice between consistency and relevance, because the button text changes depending on the context user is working on. i.e the button text will change from Save Changes to Create when you switch to create user page (and you can see e is common in both 😉 ). But while checking this we found a bug that the button text will change to Save Changes once you create a user. Its fixed now and the accelerator is changed as you suggested. The fix will be available in the next public release. Thank you for pointing out the issue.
Regards,
Vishal P.R