If the spirit moved the way it should, then the effects would move with it. Unless this has been fixed, it doesn't matter whether you change the way DS works or not, spirit effects stay put.
Besides, you may not want to move ALL of your spirits to one place. There should be a different spell that would draw ALL allied spirits to you. After all, some spirits are better in the back, than right where you are.
I doubt you'll be able to get a faster way to create spirits other than Soul Twisting or maybe Weapon of Quickness. Oh well.
