I was reading Carius' book last night (second read through), and in some of the fighting you'd think he was talking about another tank. First, he has a specific description of a one-shot knock out of a JS-2. That ain't happening in the game.
Also, in his chapter entitled "Ambush", his company of Tigers (eight tanks in total), bagged over 20 tanks (17 Stalin tanks and some others, typing it form memmory now, not sure, could have been more).
in all fairness, he does also speak of frontally engaging a JS-2 at a range "that our 88mm could not defeat at that range and angle (emphasis added).
On the whole, if you take Carius' recollections to be accurrate, the Tiger is not well represented in this game. Nevermind the fact that the JS-2 was just not as prevalent in this game as it was in reality.
As it stands now, on any CA/Tank map, the russians have the decided armor advantage and that's just silly to the knowledgeable WWII historian.