I don't remember Yoshi saying that WAR will still be the highest DPS tank. He said that WAR will still be the most powerful tank, and it's a translation. "Most powerful" for a tank might be more about defensive toolkit than DPS. It could also be interpreted as "WAR will still have the highest damaging tank move" (which is Inner Chaos with its 900 potency). It doesn't necessarily mean that it's the tank with the most DPS.