I thought that you should have a longer backswing to generate more power (ie. long draw shot or follow through). This way the power of a shot is generated more naturally than forcing your arm.
If you are lower to the ball your arm isn't as free - which means you lose power (Read it somewhere). As for being down on your shot I don't sight down the shaft at all and I'm only 5.7" !!
If you cut the Moori down striaght away, doesn't that ruin the tip? You end up by cutting half the layers off. I have always worn them in and it is a very very painful process as it takes weeks! Thanks