I'm not against the idea of balance, but I'm not seeing the major advantage to starting Sharpe over Ant. Sharpe isn't a signficantly better defender. Ant, on the current roster, is worthy of playing 30-34 minutes, so the amount of time he's playing w/out Dame will be minimal, and those minutes can be staggered regardless of who starts. Frankly, it's probably easier to stagger the minutes if Ant does start.
The team isn't so superior in the talent department that they have luxuary of deciding what good players will get minutes, when. Right now, Ant is better than Sharpe.