Actually, what a pad does is keep the bottom of the tip from mushrooming just like the top does, which would cause the ferrule to split.
As for deflection, or cue ball squirt to be more accurate. The pad has no significant affect. Deflection is a function of tip end mass, and the pad contributes very very little to that.
Spin comes from the shaft, the tip, and the stroke, not the pad.
Cue ball control is all about the player. The cue ball will go in the direction you hit it, at the speed you hit it, and with the spin you put on it.