We know you are 100% lying here, because you opened with IS-2 actually hitting infantry claim.
Also we know you are very bad, because JLI have no business being anywhere near any vehicle at any time other then retreating through one or being chased by one.
If you play the game for yourself, you'll see that the is-2 does frequently wipe 4 mans squads. At least, for what it does, it does much better than the KT.
The polls I put up got enough responses to be statistically significant, they also show that a large percentage think the IS-2 is fine, and that the KT is trash.
So, call me a noob all you want, but I'm no psychic able to determine when a single is2 is going to wipe a vet 5 JLI squad from max range, with their 0.57 target size and all. Seems more like bad luck.
The fact still stands, the KT sucks.