Buddy, we're talking about the KV2 here.
K, got it. About KV-2 then:
It's actually not a big problem to save your infantry from KV-2 shells. KV-2 is pretty inaccurate, specially when it shoots at moving targets. If you feel, that you have problem - press T and run away. Infantry saved!
But... it's almost impossibe to save your unpacked KV-2 from JT/Ele fire, cos it takes too much time to pack back again. And it can't fire back, for to scare them off - it's just like shooting man, who has Desert Eagle with Barret.
So, I guess eiter range of fire should be increased or pack/unpack time of KV-2 decreased. Just for you could have a chanses to keep your KV alive from those monsters or Dive bombs/37 mm strafes, lol.