Thought of another thing:
Damage used to stack with demo charges and mines.
Oh SNAP. This totally reminded me of OG demo charges that were cloaked. You had to constantly sweep and pay attention to parts of capping circles that your squads would go to if you queued up capping on the mini-map because it was a guaranteed wipe. Also, less OP but more stupid annoying was original soviet mines that didn't have a model kill limit - so if your squad clumped in the wrong way 1 mine could kill your whole squad.
Honorable mention to Volk Shrek blobs at OKW release. Volks then were pretty weak but critical mass of shreks made allied armor play tedious AF. Shreks also had a decent chance of hitting and killing infantry models then - so you would see stupid shit like 1 shrek killing a whole squad because they were clumped in a doorway.