Just started reading, and had the visceral reaction that the term infusion isn't the right one for wild talents that alter the blast. Infusions are already a game term for alchemists using a discovery to allow their extracts to be used by others. If there's an option to not have overlapping game terms that have completely different meanings, that will lead to less confusion in game as well as for new players figuring out the rules.
I'm having a lot of trouble thinking of a better potential word than 'infusion', even though it is already in use. Enhancement is already taken for magical improvements. Augments/Augmentation? There are a few feats and features that use it, but not any class features that I can recall right off.