Well, just keep in mind, the base of that ball is exactly 1 1/8" from the outer edge of the ball. If you ACTUALLY had 2" of slate inside the jaws of the pocket that the ball could sit on....there would be NO edge of the ball to be seen, or hit looking down the rails. As it is, you're showing about 40% of the ball is available to be hit with the cue ball.
Not really, in bold, because that 2 inches is angled outward 51° because of the pocket facing. So when a ball is set in as deep as can be against the facing, a portion of the ball is sticking out beyond the cushion.