We use Optimized, or Improved Climb, or Balanced, or Minimum, or Maximum V1 policies, and we also have to option to adjust the V1/VR ratios. Lots of ways to do the same thing.
If you stick with Balanced V1 when you are not field length limited, you might find that you are climb or obstacle limited, so if you opted to unbalance, you can obtain better second segment gradients than balanced, this in turn leads to better climb limit weights or greater thrust reductions.
And as GF has pointed out, reduced thrust only helps you if you use a fixed derated reduction, not an assumed or flexible temperature reduction.
Mutt