Fantastic post indeed. I definetly agree with you that the crawls have to follow some rules in their structure as well as in their content. The biggest struggle I had with my early crawls were that they ended up being far too long with about 90-100 words. And you have a very well written crawl there.
Also, I’ve been thinking about the ROTJ crawl lately too and you do have a very nice version. But the paragraphs seem kind of unconnected. But I think that’s a problem with ROTJ crawls in general since you need to mention Lukes quest to save Han which would naturally be the third paragraph but it can’t be the third since the movie starts with something else.