Yeah man, these are all key points. If you can't get ready and hit the ball in time, then there is no point in having a higher SW.
I know some people here advocate super high ones above 360. But when you look at pro specs for males they can vary depending on the player. Murray had a massive 400 plus SW, but I noticed he dropped it down a little and that allowed him to hit more aggressive and was when he won the USO.
So going really high is not optimal all the time. I am going to jump ~10 SW points at a time.
Please help TT Member BruceD get a wheelchair so he can play tennis again - http://tt.tennis-warehouse.com/showthread.php?t=496820