HBW: New proposal

I know there seems to be great love for a single shot ship killer without the
disadvantages of SM's, but what is wrong with calling a class
III/IV/
whatever a HBW?

Or this:

HBW: Functions as 2 class 3's (and takes 8 mass). Does 12 dice beam
damage at close range and 6 at medium.  First hit reduces it to 1/2
affect, 2nd hit totals it. Get's rerolls which ignore shields and armor.

I don't understand why the sudden interest in the uber weapon.