Given the amount of resources you have to sink into these, they're certainly not overpowered.
If you take Fiery Burst, you spend three feats (the reserve feat and these two) to deal Xd6 x2, where X is the spell level reserved as a swift action. I'd say it's fine. If you have the feats to burn, it could make being a blaster a bit more attractive due to action economy alone. You wouldn't even have to be a focus blaster. You could be a Conjurer or Transmuter, and just keep one spell slot reserved for blasting to get your free swift action blasts.
Do you mind if I use these in my project?