So I find it interesting that the attempt to add flavor has made this class boring to me. Less spells per day than a wizard and delayed progression for a very limited or expensive gimmick (although admittedly some of the abilities are very powerful)
I now have no desire to play this class as it is now, unless I'm going to be starting at least level 6 (and even then it's debatable choice over a wizard).
If the reservoir rolled over to the next day (and was much smaller to compensate) then I might take another look.
I still think I'd rather just see a sorcerer bloodline that I didn't hate.