Your comment about timing I would say ties nicely into how I view the fluff of Cosmic Magic. It is all about the ebb and flow of not just the world, but of the whole cosmic universe. Your powers are one with the placement of the stars, the aligning of the planets.
I can see many Cosmic Sorcerers being very proficient astrologers, mapping out (fluff wise) when their powers will peak and fall depending on the changing map of the night sky. So far I would say this is the less "chaotic" of the different Sorcerer spellsources. You could have a almost scientific approach to it.
I definitely don't think this was angling to be menacing like Starlocks. More simply the natural passing and flow of the universe that you are one with.