W@W had a wonderful selection of unique LMGs that were mostly pointless in light of the SMGs. BO had a pretty sorry lineup of LMGs that were mostly pointless in light of the ARs.
Hopefully Treyarch has caught on. Simply kicking their habit of giving LMGs <50-round mags would help the weapon class SO much. The Stoner and HK with 80- or 100-round drums/belts would actually have a point, for example.