When we are teaching youngsters and beginners how to hit a squash ball they need to be able to arrive at the ball in a balanced state to hit through the ball. The encouragement of moving up the centre of the court and getting round to the side of the ball enables them to get in a good hitting position.
Once you have a player who is quite capable of moving then I think we need to think about how they address the ball in a more realistic manner by moving more directly to the ball. In addition to getting to the ball quicker, this will give them a lot more shot option. When arcing to the ball and arriving very side on we are very limited to one or two shots
If could imagine in a game situation when your opponent plays a boast the last thing you would do would be to move away from the ball.. you would move directly to the ball otherwise the ball would bounce three or four times before you would get there!
One thing to add is that we don't want that last step to be too big otherwise we are getting ourselves into this extreme position and we can't get out of it easily. So we move directly to the ball we are looking for that pivotal step at the end of the movement which brings us round on balance able to execute a number of different shots.