While this is actually really awesome, I think a lot of the nastiness of JS can be dealt with by using a good JSHint plugin for your text editor (that highlights errors/etc as they happen). Hoisting, function scope, ==, var, using variables without defining them, etc - it'll catch many things.
If I ever write JavaScript, then I definitely use JSHint. It doesn't help with some things such as immutable local bindings, type checking, not having to worry about hoisting, or any of the nice syntax features you get with GorillaScript, which is why I see the benefit.
