As far as splat books go, idc if 90% of the spells added are entirely forgettable. But silvery barbs, vortex warp, synaptic static, and the summon spells (all of them) are extremely strong and most casters at the table I play at have some or all of these particular spells. And that's how spell lists work; it's nothing like getting a new subclass. All it takes is one good spell being published for it to increase the power of every existing caster that gets access to it.