When last time did you see IS2 killing 5 At guns? Cause there is a video with KT doing that.
Guy from that video needs to learn to count, since he only has 4 AT guns, not 5 like he states.
As for the whole situation - he was fucked by RNG, not by "oh so godly" KT stats. Each of those shots had over 40% to penetrate, yet ~10 in a row didn't. You know how unlucky that is, right?
I'm not saying KT did or didn't need the nerf, it's far too early to say, but please stop using such RNG heavy examples as main arguments to balance units.
Or would showing you a video of a pre-nerf KT getting killed by an IS-2 in a straight shoot-out made you campaign for KT buffs/IS-2 nerfs? (and FYI, that would happen in around 4% of duels, far more likely than pre-nerf KT bouncing 10 ZiS-3 shots in a row).