Super Frames are super cool, but they would be especially useful if they had a few more features:

• The frame can work if it is only a single block thick.
• In this mode, the frame only has to be complete on 3 sides. (Maybe even 2.)

This would make large doors much simpler to build. With frames as they are, you either have to frames that pass through the opening, or the door has to be at least 3 blocks thick.

It would make doors similar to this possible: