As I understand it, mass balancing to 100% could cause more problems, bear with me.

If the control surface is neutralized by static balance then the servo which has zero torq available in the nuetral position would be throwing the load back and forth thus spiking servo motor amperages +/-. This in effect would be a micro flutter already setup.

My understanding could however be flawed since I buy into the digital servo OEM hype that it takes a movement off of center to develop servo torq, and digitals develop the torq closer to center than do the others.