You present a persuasive argument for the abandonment of the 5-paragraph essay and suggest a new format for presenting an argument... However, you did not provide much information on what is expected to go in between your introduction and conclusion? You suggested this format opens the essay to compare/contrast, cause/effect, analysis, etc... but how do you suggest students structure an essay with these approaches in practice? Any piece of writing needs some structure and main ideas that are then supported with various pieces of evidence (whether you are writing a historical thesis or a persuasive essay)... If you are abandoning a "main idea followed by supporting evidence" format, what do you propose should take its place? Or perhaps my understanding of the 5-paragraph essay you are speaking of is incorrect?
One might find that from the previous examples the Aztec writing system is complicated and not straightforward to modern eyes. Glyphs can be polyvalent, functioning as both logograms and phonetic signs, and are not always read in a linear fashion but could jump from one end to another. However, Aztecs and their neighbors produced countless numbers of manuscripts with subject matters as diverse as time-keeping, astrology, mythology, genealogy, and history. While these manuscripts were highly pictorial, intimate knowledge of the underlying language, Nahuatl, was absolutely essential to fully interpret the glyphs. In this regard, the Aztec glyphs truly constituted an active and productive writing system.