People will argue that the focus ring is supposed to be for fine-tuning focus after you use the AF/AE lock button but, personally, I would have much preferred a more responsive manual focus.
Yeah, I find that to be a cop-out too... manual focus means manual focus with a ring IMO, not push a button and then focus a little. If I want to push a button, I'll just focus with the shutter release button. However, whatever works for the user.