Where ECMAScript Needs to Go: Three Goals
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The earlier part does give a specific proposal (for better math support -- which again even we non-JS-ninjas can get). But the rest of the article also outlines why these specific changes matter, and how they fit into the bigger picture of ECMAScript's evolution.
The three central desiderata for ECMAScript.next, according to the post, are:
Check out the full article for more discussion.