What I really want to see out of one of these apps is a way to support partials within other pages. It would be awesome to design my whole SPA within a tool lik

What I really want to see out of one of these apps is a way to support partials within other pages. It would be awesome to design my whole SPA within a tool like this and then export it in a uniformed way which I could then tie into angular, ember, a cms or whatever workflow I am using. Personally I don't want the design tool to make those assumptions around what my infrastructure might be, although clearly this particular tool is aimed at non-tech users.