As I've said elsewhere, I really like this system for a number of reasons. However, I do see one problem I would like the devs to keep in mind.

If my math is right, DoL leves are going to give, percentage-wise, far too much SP per leve. Right now you can only get 6 (good) DoL leves per 36 hours, which is a reasonable balance of SP for that timeframe. However, if you can really get 12 DoL leves per 36 hours, ranking up (which is already insanely powerful with DoL leves) is just going to be absurd.

Hopefully there is some balance that can be struck.