All Artillery hits in 5 point groups, why not ATMs?
I do agree that the 6 point grouping would leave you a better, "My HE/Std didn't split", feel, but really, anything that cuts down on the need for the dice box of death is a good thing.
Medium Lasers are basically fine crit seekers, not everything needs to be 1-2 point groups.
We already have the pain of the LB20X in the game, do we really need an ATM-12 to hit 12 different locations slowing the game down?
And really, if an ATM12 hits for 36 damage your getting 7 locations out of it.
Taking it down to an ATM-9 on a 7 roll gives you .... 21-24 damage IIRC? That is 5 chances to hit either way. Is that really THAT much worse than 7-8 instead?
And the 5 point groupings when stacked actually function as 10 point hole punchers too. You don't get that when you break it down into 2-3 point groups really.
While I agree it isn't the most well thought out damage grouping, I do like the simplicity of it in matching LRM/Artillery damage groupings.