I think ES6 is the solution. Evolve JS and remove the "warts" instead of introducing new variants.

I'm a big JS fan. I can't stand Coffeescript - it doesn't seem to add anything except changing the syntax to make it easier for Rubyists to understand. Which is fine, I guess, but feels like a personal preference. More like a text editor setting than something anyone should publish their code in.

Same for Typescript, to a certain extent, though I understand the heartfelt desire to have the compiler pick up some of the more common errors.

We run the risk of fragmenting the community by promoting CS and TS - better to evolve JS itself, which is what is happening and it's great.

TL;DR: kill Coffeescript and Typescript, evolve Javascript for the win!