Actually I'll agree the docs are awkwardly placed on the landing page. They should be front and center. Bootstrap also does do more. Though that's good or bad depending on your point of view.
Personally I would lean to bootstrap if I wanted everything and the kitchen sink and didn't plan on modifying much about it. For more serious work Foundation provides just that, a good foundation for building on top of. It's far less full featured but much easier to extend and modify (imo).
