Updating from 4 to 2. Still a fun game but newest update added new unit defense and pierce ratings with no explanation how they impact the game. They also changed a lot of unit ratings and in some cases made units who used to be very good a lot worse. This is very frustrating for people have spent a lot of time and resources collecting and improving these particular units to have them suddenly nerfed. If they would communicate recent changes to the players better this rating could go back up.