I think that the best feature that go was able to create is a very strong community around the language, where practices are as important as the language itself. Maybe these practices are what makes the community strong?
Also not adding every single feature that could be nice is a good thing to me. Yes, there is a lot of syntactic sugar you could add, but this just ends up in even more debates and in the end it doesn't matter that much. There is a very clear path how to achieve regular things in go and that works fine for now