RE: rangefinder
Unless you are really high up in the tree, the new ARC system is of marginal utility, IMO. Let's say you are 15' up in the tree - or five yards - and the deer is 20 yards away. That's only about an 11 degree angle. Arrow is going to hit a couple inches high - but so what? At longer distances, the angle is less and the ARC feature is of even less importance.
And even if you are sitting in a very high stand, I would just do some ranging at the base of the tree before climbing - put out some little markers, like a small piece of orange flagging stuck in the ground with a nail - to indicate the 20 yard perimeter.