Isn't it annoying when something in a game completely changes without you knowing? In this case it's not really annoying because I think it's superior, but let me explain. I've been playing Advance Wars: Dark Conflict.
I've had it a while but only been seriously playing it recently. In the last I believe 3, 2 for sure Advance Wars games, your technique score is based on the % of your units lost. Therefore if you pump out more units, you can soften the blow to your technique score.
So naturally when in full control of a battle, I've been pumping out as many cheap units as possible to improve my technique score. But I've been getting low technique scores and after a particularly dominant victory and getting a low technique score I knew something was up, so took to the wonderful World of the internet to find out what.
So now doing this works against you instead of for you. Your technique is now based on getting the job done with as few units as possible. Each new unit is 1pt against you, and each unit lost is 1pt against you. It's probably superior since you can't exploit it to an extent like the previous system, and getting more done with less while minimising losses is probably a truer test of your technique.
The power rating has also changed, but not in such an opposite fashion, and is also probably superior, since the old power rating was based upon the most kills in a single turn and the less enemy units the enemy pumps out the better, now it's based roughly on killing things in one hit to raise it and killing things in 3 or more hits drops it, so it's now about your performance over the whole battle rather than setting up for one single turn where you can kill a lot of units.