Writing a lot of JS makes you stop believing in JS for the long haul. It's just impossible to write anything large without lots of fragility, and the bugs are often incredibly subtle.
I do work professionally writing JS (client side and Node.js), I see where you are coming from, but I certainly found CoffeeScript had lots of new subtle bugs and issues to replace the JS ones, and ultimately I wouldn't recommend it over Vanilla JS. I don't exactly love it JS either, but I feel if I were to really switch to something, it had better truly offer me something useful.
Facebook opt-in strict typing tool might be a decent option.
I also have many interests beyond JS, such as learning Go recently. I'm happy to bin it for a better life, my real question is will I have a better life?
There are lots of alternatives other than CoffeeScript[1]. HN has recently been full of "[some language] transpiler to JavaScript" posts. A strong type system and more sane error-handling seem to be major motivators.
Glad to hear you've been learning Go -- there's a transpiler for that!
