It would be great to be able to select specific battery efficiency modes. Like I don't need my watch to vibrate except if its for an alarm. I don't need the vibration for when I activate a sports session or for when I reached my daily goal. These are all things that will waste battery for my watch.
I've had my Move watch now less then 12 months and I will have to replace my battery already.
Would be great to be able to deselect certain vibration things, based on preferences.