I love this number because it has kept me from getting REALLY frustrated with some tanks, and it helps to keep win/loss record in perspective. I am a player that loves playing new tanks, and I have played 96 of them, so it took me forever to save up the money to buy my Ferdie and Tiger II. I finally broke down and sold a few of my favorites, Jagdpanther, KV-3, KV-1s, etc, and I bought the Tiger II and Ferdie on the same day.
I had never been so disappointed in a tank as I was with the Ferdie. In 1700+ battles in TDs I thought that I would kick ass in the Ferdie, but my win/loss started around 20% and stayed low battle after battle. Looking at the Efficiency rating I was performing OK though (12-1300), so it kept me willing to work through the grind to get the better guns. Now with 43 battles I have clawed my way up to 42%w 56%l and 2%d with a 1588 efficiency, and I still have 7k exp to go to unlock the top gun and 38k exp to unlock the best engine.
Logically I know that with an 80% hit ratio, an average damage dealt of 1419 per battle, and an average of 1 medal every 5 games I am doing pretty good, but sitting at such a horrible win ratio when I am in the top 1/3 of most battles makes it hard to want to keep playing a tank that I could sell for nearly 2 million credits. The Efficiency Rating has become my new number of choice because it lets me look at my actual performance, and helps me remember that sometimes luck DOES play a huge role in early win ratios.
On the flip side, I have a 56% win rate with my EZ-8 in around 75 games, but never felt that I was all that great with it (I am horrible with pretty much every American tank, much to my dismay). My Efficiency rating of 925 shows me that my teams were winning despite me, not because of me
, and that selling it off was a good idea.
I know that this rating, like every other one, is not perfect, but since it takes multiple factors into account instead of just looking at one number, it sure seems like the best gauge we have so far.