The first bit is the bit I take issue with, primarily because it gives skills the same functionality that makes certain champions special - in that they can merely target spells in the direction of the mouse pointer, with no click (Zyra, Karthus, etc). These are specialties of these champions, and their abilities are either passive in nature, not directly aggressive, or deal comparably low damage because of the speed at which these skills are able to be flung out.
That changes the instant that you begin to fling high damaging spells, back to back, in flawlessly straight lines. It requires the same skillset as a FPS, and nothing more.