@bhu: I have some thoughts on johnny one spell, if you're interested.
Easy spell removes somatic components, thus negating spell failure due to armor. What's the point of defensive spell?
Easy metamagic seems too powerful. I'm having trouble imagining someone not opting to be able to twin, quicken, and/or chain their spell with no slot adjustment.
For spell's master, you probably should use wording like “If the spell has an effect that increases with caster level but has a cap, the cap is removed.”
So, if I picked color spray, would that part about increasing HD limits raise the thresholds for each set of conditions?