Well, the game is still in beta, so we may see some adjustment of unit performance still. I'm glad you like the way it looks, though. I tend to prefer the designs that tie into real-world roles a bit better.
I was thinking the same thing about its vague resemblance to the mammoth tank, but after playing countless hours of world of tanks I can only theorize its a tank destroyer but more of a base defender because of its low profile and heavy frontal armor. Having 2 main guns for higher rate of fire and the flak turret for anti air and infantry. Very nice design, while cutting edge its a possible look a like for a future real tank. love it