Me thinks CGRetired probably knows his stuff, but clicked "OK" before a good once over.

Reducing ATV or End Points obviously reduces servo resolution. It also reduces effective torque to control surface. Both are bad. For this reason, you should always try to resolve throw issues mechanically, not by reducing ATV/Endpoints.

Precision is obviously precision based. CGRetired's post does state this... maybe a better order would have been "If precision (pattern) is not an issue"

You can lose some precision by using the innermost hole on a servo on a bad setup. If there is slop in the linkage at the servo side, it will translate to lack of precision at the control surface. This is exergrated on inner servo arm holes. This is however a very small effect, is probably only noticed by us pattern freaks, and can be resolved with ball links, so I would't worry too much about that.