on one of the slide in this presentation i found this interesting ( https://speakerdeck.com/u/clkao/p/livescript-tax-free-javasc... )

   Javascritp + ruby  = coffeescript
   coffescript + perl = coco
   coco + haskell     = livescript

So i think coffeescript is not the end of the line, and i think this mean, there is a serious need for a better javascript