I would have wanted to see more innovation. It's boring and dull.
For example, where's the great syntax of Go that allows you to do "foo := 5" where the colon : means that it will set the type based on the initial value.
Where's the support for deconstructors? They added classes, but not Traits? Why the language requires all those braces, parenthesis, etc?
How about an ability to slice strings like "foo bar"[3,5] ? What about generators and yielding? Jesus, don't take away those awesome ECMAScript RegEx literals!
Complains aside, I do like the "_" private prefixes and the fact that you can have a "num type" that's basically two types together.
If it performs fast and has a lower "startup", it does look interesting, but I wish they did more innovation.