I agree with everything you are saying. Coffeescript really is for people who prefer a ruby/python syntax, and who just don't like javascript's syntax.
BEATUY IS IN THE EYE OF THE BEHOLDER people! Just because you find javascript 'ugly' and coffeescript 'beautiful' doesn't actually mean everyone agrees with you. I think Javascript is beautiful and I've been coding it for 14 years. I have no need to replace the syntax, or complicate my development tools, or make debugging any more complicated that it already is.
Coffeescript evangelists are like born-agains who try to convert every man woman or child to their newfound religion because their god is the true god. It's annoying really.