From what I understand, the primary reason for introducing arrow functions into the language was to provide a syntactic shorthand for normal functions. They decided later to also add auto-this-binding capabilities to arrow functions, so that they weren't just a shorthand. Now, we're attempting to make a shorthand for normal functions again - which means arrow functions must not be doing their job at being a good shorthand for normal functions.
That said, I do see the appeal for the proposed shorthand.