The thing about commandos is that they don't have much combat veterancy (more utility) so they needed a strong nade to be relevant.
Squads that get the bundle grenade on the other hand do get nice veterancy and now they have a nade even stronger than the light gammon bomb. Why? Sure the bundle nade was underperforming but it only needed a slight tweak.
light gammon bomb has shorter fuse time ( most important) and i think better aoe far damage.
Also relic plz look at falls they suck terribly especially against vet 3 rifles and tommies