I understand the premise is to speed up the game, but I have heard discussions between players that it may slow down play. With some players wishing to keep the pin in and other wanting removed. Personally in a casual round with friends I would tend to leave it in on putts outside of 20 feet and some downhill putts. In competition I would probably be more traditional and have the pin removed or tended. It is a personal decision that everyone needs to make for themselves, but if the group is playing ready golf it should not slow down the game.