The proposed rules should help to improve pace of play. However, would someone be able to shed some light as to why dropping from knee height is better for the game than shoulder height is? I simply do not understand why changing the height of the drop is necessary when I have never seen any problem with it.
Kevin,
You are taking relief from a lateral water hazard (red). You get two club lengths, no closer to the hole. Occasionally, because the edge of the hazard parallels the "no closer to the hole" line, this leaves a narrow sliver for the dropped ball to hit to be a proper drop. A drop from knee high is more likely to hit the sliver than a drop from shoulder high. I have supervised scenarios when the number of drops was in double figures.
As someone else mentioned, the shorter drop height will cause the ball to hit the ground with lesser velocity, reducing the amount of roll.
Unless I am told otherwise, I would accept a drop from a golfer standing erect with arm in normal hanging position. With arms hanging my fingers reach the top of knee, and I am not a freak of nature (maybe debatable).