If you want, go ahead and make the change. My opinion stays the same as a "useless addon". If you want to stop healing and enter the battle again, you can easily and simply do that. I don't know what player doesn't have the 2 seconds to actually just move the character.
Second, I would certainly want my character that is using meditate to stay where I put it, not go wandering off on it's own. This will happen because of WC3s built in aggro system. I like to have control of my characters and this doesn't really change, add, or make anything better. However, if everyone else is keen on the change, I won't cry about it. It's just a small and insignificant change anyway.