What your argument equates to is turning every writing assignment into free writes, journals, rants and blogs. These are appropriate exercises to build off of, but that's all they are. Your refutation also assumes the five paragraph essay stops at five paragraphs, when it is really just the starting point for everything else. And I am confused when you argue "The five paragraph essay limits students into about 1 1/2 pages"; most are really about 3-4 pages of three transparent, well developed body paragraphs that define, present evidence, and explain with examples. All the emphasis on common core, Aristotle, and argument seem like red herrings in this argument about the five paragraph importance. If you are a high school teacher who wants to truly prepare your student for college or work, then you SHOULD be teaching students to use the five paragraph as a starting point of construction. You'll be doing them a big favor.
For a 1 page essay or to write an answer to a long essay test, make each section one paragraph.
1. Introduction with thesis statement, 1 paragraph
2. Body point A, 1 paragraph
3. Body point B, 1 paragraph
4. Body point C, 1 paragraph
5. Conclusion, 1 paragraph
For a 5 page essay:
1. Introduction, about 3/4 to 1 page
2. Body point A, about 1 page
3. Body point B, about 1 page
4. Body point C, about 1 page
5. Conclusion, about 3/4 to 1 page
For a 10 page paper:
1. Introduction, about 1 page or 1 and a 1/2 pages
2. Body point A, about 2 and a 1/2 pages
3. Body point B, about 2 and a 1/2 pages
4. Body point C, about 2 and a 1/2 pages
5. Conclusion, 1 page or 1 and a 1/2 pages
For a 15 page paper:
1. Introduction, about 1 and a 1/2 or 2 pages
2. Body point A, about 4 pages
3. Body point B, about 4 pages
4. Body point C, about 4 pages
5. Conclusion, about 1 and a 1/2 or 2 pages
For an final paper in an intro or 100-level college class, professors don't usually ask for more than 10-12 pages. For a final research paper at a 300-400 level or upper level course, you can be expected to produce papers of 15-20 pages. Naturally, this depends on the university you're attending, the professors' preferences and your field of study. Math majors will not have to write long papers. History majors will write lots of lengthy papers.
When it comes to the process of how to write a 3-page paper, you should give time and make a plan. Getting started is not easy, so ready yourself; refresh your mind; and get rid of all obstructions. Here it is!