should uworld be used just as a q bank only or do you recommend students to use this as their primary source for content and practice and then add full lengths and test questions from AAMC, and other companies?

Well I have the Kaplan content review book set for my content. Then I use only UWorld q bank and AAMC q banks, sample test and practice tests to practice my knowledge. I also use Anki to make flashcards of content I need to drill into my head. Hope this is helpful