Out of all of those points, it's really just the commas and curlies that I've found can lead to some confusion, in my experience at least.
I haven't come up with a better approach than simply agreeing on a convention with your team though TBH. It's not too bad when everyone's on the same page and familiar with the gotchas (same could be said for most langs).
I put together a post comparing some of the syntax differences as it relates to building ReactJS components in case you're interested: http://rapin.com/blog/2015/02/03/reactjs-with-coffeescript/
Given that JS itself has quite a few different ways to do things though, it's kind of a wash.
[1] http://ceronman.com/2012/09/17/coffeescript-less-typing-bad-...