Maybe in some time more people who want a large web framework will be using Go, but right now the reason you don't see traction in that area is because there isn't a desire. I think if you squint your eyes while using the standard library's http templating and http libraries along with some popular libs like Gorilla's sessions and cookies, you'll swear you're using a framework. Of course, this isn't going to give you the same re-usability you get from a framework that's as compartmental as Django.