The level progression is a bit too fast as of right now, I think. It doesn't quite follow the 5E rules. I had 2,300 XP and was lv. 4, usually you advance to lv. 4 at 2,700 XP. I don't know if they will change that still or that it has to do with balancing. I think the lv. 10 cap has to do with spells. At lv. 11 characters gain access to lv. 6 spells and maybe they were unsure about whether or not to include those. If they do, I think, we can expect the new level cap to be lv. 12.