Good post! Great Off-canvas navigations are particularly hard to find since they are usually required to do so many things: To open left, right, top, bottom, overlap, push, contain submenus, work with sticky or fixed triggers and more.
Thanks to lots of feedback there was a push to build something better. In Foundation 6.3, released on Dec 15th, there is an all new improved off-canvas. It's seriously better than anything out there! We’d love to hear the challenges or common patterns with off-canvas are you working with. Check out the details and jump in on the conversation!
http://foundation.zurb.com/forum/posts/49868-new-improved-off-canvas-in-foundation-63