Swen said they're making systematic changes with source, hence the removal of the source pools. Presumably there will be some new opportunities to gain source points in the first act, unless they plan on making it more of a second act+ thing. The source pools felt really weird anyway. Like, oh wow, here's some source just lying around for some reason! Maybe if it was clearer that there was some reason these source pools existed in their locations, like, a powerful sorcerer had died there, or there was some kind of source spring, but even in those situations, I feel like dialog interactions would feel cooler and help explain why source is lying there.
And yes, magisters definitely should not be using source skills willy-nilly. Or maybe you could have a couple magisters use it in a desperate moment, and their friends are like, "what the hell?!" and start attacking them.
