The other issue with the MK III is the placement of the mag release. There was nothing wrong with the heal release on the MK I, and MK II. These are target, and plinking pistols with no reason for "tactical" magazine changes. The placement of the mag release to the frame, while maybe a nice marketing move, does nothing to improve the pistol.
If you happen to dislike the heel release, which many people including myself do, the frame release represents a major improvement.
I agree the other "features" are not needed but that isn't one of them. You really seem to be going out of your way to bash the MKIII's. You don't like them, we get it. But they're not bad guns and certainly not a discernible step down from the MKII's aside from the LCI and mag disconnect. Remove them as many have and you have essentially the same gun.