RE: The TL;DR: Can we have one course with multiple quizzes where a learner can complete all or some of the quizzes AND obtain data on the quizzes and answer choices or is this wishful thinking?
Not in my experience,
In SuccessFactors, you can set up a series of quizzes/exams *built in SF* that are tied to completion of an SL module. So you might consider six separate modules (= six SL published outputs, and therefore six separate story files), each set to mark as "complete" based on something (not a quiz score); and then tie a SuccessFactors quiz/exam to each one; if they pass the quiz, they can take the next module. So eventually they pass all six quizzes and take all six modules.
While it doesn't exactly align with what the customer appears to be asking for, this may be a case of the customer not really understanding what tools can do what. (So the customer may be using a chisel as a screwdriver because "we've always done it before," regardless of the fact that the customer's employees have cuts and scrapes arising from improper use of chisels.)
