[WoWs Dev Blog] Explanation of Roma’s Sigma change : WorldOfWarships

ST, Italian battleship Roma, tier VIII
We have received a lot of feedback regarding Sigma count of the Roma battleship.
Value of 1.9 showed slightly increased combat efficiency of the ship in the hands of strongest players. 1.8 is the normal value for tier VIII battleships and it will allow Roma take an appropriate place in the balance hierarchy, considering all of her advantages.
Some of them are: high maximum speed and great overall maneuverability, fast turret traverse, good concealment, solid anti-torpedo defense (40% damage reduction) and hefty horizontal plating. In battles you will be seriously damaging the enemy cruisers and battleships with armor-piercing shells while avoiding many of their retaliatory salvos, even torpedoes. If the torpedoes do manage to hit your ship, the damage won’t be as high. Moreover, thanks to Roma’s low hull and superstructure height, her concealment capabilities will allow you to strike first in a firefight and do it from the most comfortable distance before being detected.
We would also like to emphasize that ship stats do change during the testing period, and that is done to allow for the best possible balance, when the ships are officially launched.