Decreasing the multiplier the 10X and 20X do vs Light Armour will actually achieve nothing on the instagib problem. A Loki C or Beatstick will still instagib all ASF. You reduce the multiplier to the point where they don't and LB-X becomes useless against ASF.
And...? Are you suggesting a Beatstick should not kill ALL aero's with a successful alpha? I think it would be ridiculously retarded if it did not. Hell, if you're suggesting 2LBX20s shouldn't kill a Shiva, I think you're WAY off what I believe the balance should be.
If the LB-Xs had the same DPS, RoF and overheat characteristics as their Standard AC counterpart then a Beatstick would be crippling a Shiva with an alpha hitting, but as RoF has been improved it will take some sustained fire to kill it (maybe it's only 1 or 2 seconds of sustained fire, but that's preferable to instant), I think that's fair it has 10tons of armour, like a flying Warhammer (That's why weapons without the multiplier against Light armour feel weak against a Shiva).
@The Wolf, all the other Autocannon types in MWLL employ sustained rate of fire to kill the opponent, and the LB-X AC is just another type of AC. It's still point and click, but now it would have a much faster RoF. The LB-X is shotgun-like, but it's not a shotgun (it fire a cannister round that splits into submunitions immediately prior to reaching the target). There's no reason why it's RoF should be so slow (other than peoples prejudice of shotguns from other FPS, they are balanced to be slow), that slow rate of fire concentrates the DPS of the 10Xs and 20Xs into 1 instant and this creates the instagib problem.
Reducing the modifier for the LB-20X alone
will not work; people will just pick rigs that sport 2LB-20X and instagib away, or with Mechlab stack up on LB-10Xs and instagib away. The modifier is not the problem, it's the slow RoF that concentrates the LB-X ACs into point and click instagibbers.
This suggestion isn't a nerf in any way, the DPS would remain the same it's just the LB-X AC would now require some skills to use 100% effectively...like the AC, UAC & RAC. An LB-X is an Autocannon that fires cluster-submunition rounds, so it should function like the other ACs, the only difference is ammo type.