So it deserves to survive artillery?
If its consistent that it survives katjushas and other arty barrages? I think not. I am quite certain that most situations that unit dies in arty barrage? (BARRAGE not a single grenade dear god most infantry models survive even pointplank AT round in face *GASP*.)
It is just like that retreating limping comet that is one shot away from dying and every single shot you shoot at its rear i either miss, ricochet or non damagin critical until it gets to safety.
RNG is the on great point in this game, some times you are lucky some times not. I like the randomness, it's exiting to watch vehicles skidding on ice in front of AT praying that it won't hit or break the ice. Game is much funnier that way.