Consider ES6 too. It also does a good job at removing some Javascript quirks and adds sensible looping constructs, list comprehensions, generators and generator comprehensions, proxies, rest/spread arguments (removing the need for the magical `arguments` identifier), classes (just sugar for what we already wire up with prototypical inheritance), modules, fat arrow functions etc.

No help on the DSL front though - still stuck with various kinds of brackets and parens.

On the other hand, it doesn't do the utterly horrible mistake of conflating variable declaration and variable assignment while forbidding shadowing, resulting with surprise bugs and spooky action at a distance.