In Photoshop, Illustrator, and inDesign, you can leave the text editor with the ESC key. In some instances, it even switches to the move tool simultaneously. Typography is such a huge part of motion graphics so having the ability to edit and move text around quickly is incredibly valuable.
Right now, in AE, hitting ESC after editing a line of text undoes any changes. This is especially frustrating when I've spent time meticulously formatting and kerning characters and then all that work is gone in an instant. Command+Z doesn't bring it back!
I'm aware that Command+Enter will keep changes made to a text layer, but Adobe has already built this muscle memory of pressing ESC in the other apps. And getting my left hand to hit Command+Enter is such an awkward motion (and I'm a lefty!!!).
This probably falls under the request to have ESC as a custom hotkey, but I think it should be addressed regardless.