Those of you who are capped already at the max XP of level 10, will need to complete (or perfect) a single area to get to level 11 and go on from there.
About Mitsu's missing skills -
We have a detailed plan on what skills Mitsu will have (up to level 20), but they will be added later on; Naturally, once we add those skills, your character will posses them retroactively - meaning, if you are level 14, you will instantly gain the skills that have equal or lower requirements then your level.
Another small notice - we just gave players who played since before the Glory system all their missing glory.
So don't be alarmed if you suddenly get a large glory addition to your account! :)