Thanks for your graphics tippy:
Although that the shaft center is not at the same distance that the aileron and pitch, the radius is always the same. In theory when we apply the same amount of distance to the three servos that move the swash plate, they will travel the same distance up and down, the difference will be appreciated when only one of the servos is actuated up, then the other will partially have to raise or lower but the travel will be different. The 140o swash plate idea is to compensate the travel of the servos and make this swash plate more natural to move increasing then the final results. In the real world, as you mentioned this kind of differences tend to be minimal in the heli behavior leaving only to the Pro Pilots its benefits. As technology advances, al of this upgrades tend to make our helis better and behave more stables with high possibilities of a great performance in 3D areas. I have had the opportunity to fly several helis on the sim programs G2 and G3 by Great Planes and there are a lot of difference between this two simulators, obviously they tend to make the flight pattern more real and I have found easier to fly an heli on the G3 program version.
New radios like futaba 12 with fasst technology has going a little more far with up to 8 swash plate configurations, that let us know that the final word is not written yet but we are very closer to the real thing.
Some helis that are in the market by now, like raptors and Kinetic 50 from HeliMax have not a CCPM configuration but they are 3D capable at a certain point. Maybe CCPM could make them perform better but as I said before, for a Sunday flier the differences will be barely noticeable.

Thanks:

Alfred.