This may be my most ambitious meta.
This was a learning experience but what I learned is not that pleasant.
I learned when a constructor sets himself up with an intricate problem of creating a puzzle that cleverly follows an intricate mechanism and the constructor gets the thrill of solving the problem.... Unfortunately for the solver there will not be the thrill of solving the problem, there's only doing of the puzzle which, although it may be amazing that such a puzzle could have been made, says nothing about what experience the solver may have in doing the puzzle.
Here I have a puzzle I am very proud of in the many intricate themes it incorporates. But... I have to be honest as a solver it would be arduous and a total work out.
So I don't know what to do. I love this puzzle and I want people to do it and maybe afterwords when they see the themes they'd appreciate how it works. But... I can't imagine it being enjoyable.
I don't know. Maybe someone can do it and tell me what the think.
5A. "B" originated as a pictograph of a House. Every down clue that contains a reference to a house should use the letter B.
10A, "C/G" originated as a pictograph of a Stick (maybe... some of these are iffy and conjecture). Every down clue that contains a referenct to a stick should use the letter C or the letter G