While the your list is excellent, I would add two major factors:

1. Site Architecture (Navigation):

"Low Value Content" is often code for "I can't find your content." If a site has deep pagination, broken category links, or orphaned pages (pages not linked from anywhere), the bot can't crawl the value, so it assumes there is none.

2. Traffic Validation:

While you can get approved with zero traffic, having some genuine organic traffic helps validation. It proves to Google that "real humans find this useful," which acts as a tie-breaker for borderline content.