isn't it like this with all mortars?
one of the biggest reason why the 81mm mortar got a rate of fire nerf.
Yeah, 40 MP more expensive because it takes 4 deaths to decrew opposed to the ISG's 3. And the Pack Howi has larger AoE (meaning more reliable suppression) and it's vet is light years ahead of the ISG's.
the pack howitzer might have bigger AOE, but it's also got shorter range and less mobility. The gunshield on the LeIG also dramatically increase its survivability compared to the pack.
A big factor in gun survivability is keeping the current gunners alive. If one of the active gunner died, the gun stop moving as one of the spare crew take his place. The pack howitzer gunners are unprotected and will usually die first. this lead to the crew getting stunned lock as the spare take his place and try to move again.
LeIG gunners are much better protected doesn't have the same problem. The better range and mobility also allow it to keep up with your troops troops. Meanwhile the pack howitzer have trouble keeping up with the US rifleman.