A quick thought: When entering text/system text, I use Esc to finish. Would it be an improvement to use Enter/Return to finish/exit, and Shift+Enter to create a new line?
Shift+Enter for a new line is used by Facebook and Facebook Messenger so it might be more intuitive and quicker. I don’t know what others think?
This sounds like a good idea.
Not because Enter at the moment produces a line break, but because Escape does actually mean something else (going a step backwards, cancelling the last action).