^Absolutely disagree. It's damage is fine as it is, it's just not good on the move. But if it got damage on the move as well we'd have a crazy strong and cheap scout car. I like the Kübel design as it is tbh.
Its not like you cant vary the build...double conscripts with early at nades will shut down any and all 222 ninja moves, and a half decent player will invest his first munitions into mines anyways. I second your comment about mortars though, they are indeed dangerous, but again, its all RNG and by no means reliable enough to be counted upon.
If you're opening with snipers then you won't have a lot of conscripts to begin with, and it's not that hard to evade a single conscript. This is really vital to remember when you're facing double snipers. Yes, in the early game it's hard to counter snipers, but snipers is pretty much all he'll have in the early game. Even if all you manage to do is make those snipers retreat, then that's pretty costly because for some time pretty much all of his army will be on the way to the base and back again, giving you the time to take control of the map.
Also, the cost of AT nades when you've got only 1-2 conscripts is hard to justify imo.