Well if 'Playing well' Is the counter, Then its good balance, Its nether too easy to pull off nor too easy to counter.
That is where you are wrong.
When you need to play 'well' to counter your opponents mindless lmg and shrek blob and clicky offmaps, thats not balanced, but unbalanced.
I think the damage is at least part of the real problem.
Right now, if you try to flank it and it gets away, it usually kill 3 or 4 models of your 3 riflemen.
By the time you finally manage to kill it, it easily paid for itself.
Isn't it supposed to be a suppression platform?
Right now its doing way too much damage on the move.