I don't think Julia is trying to be anything like Go and it shouldn't be.
Probably Julia's best feature is the powerful metaprogramming support that allows you to, e.g., create array packages that automatically run code on GPU. You can't have such features with a simple language.
That doesn’t mean it can’t learn from it. Yeah they are solving somewhat different problems but in sheer usability of a language Julia could take a lot from Go.
> powerful metaprogramming support ... can't have such features with a simple language
Various Scheme implementations are among the simplest languages I've ever used yet possesses some of the most powerful metaprogramming I know of. Perhaps I misunderstood you somehow?
Probably Julia's best feature is the powerful metaprogramming support that allows you to, e.g., create array packages that automatically run code on GPU. You can't have such features with a simple language.