French wikiversity community recently had (fr) a discussion about ability to conduct a MOOC with our technology. But currently we don't have, as far as I know, any way to store account data relating to Quiz scoring. Implementing that would be great, and having some legal support on how to manage this "personal" data, as well as a community feedback would be awesome.
On the long run, it may be interesting to provide "evolution graph" to users, so they can monitor their competence evolution, and other fancy feature like that. It would be better to take this into account while structuring the stored data.