User blog comment:Darkveng/Making sense of game mechanics/@comment-5012038-20130520231702/@comment-136.166.44.135-20130521221644

Correct. The button configures the cards & weapons to maximize deck rating. It seems to have a particular interest in maximizing ATK power, especially on the back row. If you have a Flamewar weapon, expect to find it on whatever card has the most natural ATK power in the back row....if you choose to use the recommend button, anyway. In my experience you can get better configurations manually, especially if you're building your deck for survivability and not just raw ATK.