i have a very strong feeling that in the 40k universe the kroot has a bigger part to play.
i can see a gap for a low toughness, minimum save army that infiltrates, can shoot well, do ok in Hand to Hand. forge world offer some cool kroot options but there is room for more. HQ's could be some sort of clan chieftain, ELITES could be snipers, head hunters, TROOPS could be the normal kroot but maybe some other options to add flavour. cavalry (riders) beasts, FAST ATTACK could be riding large lizards, you know the kind of thing.
i see kroot a bit like the ratskin scouts in Necromunda. started off a few additional models to beef up your gang then ended a gang in their own right.
im SURE kroot could be a major option in 40k, what do you all think... if you even care?
"WAAAAGH! VROOM VROOM!!! DAKKA DAKKA DAKKA! Dead gud innit yoof?!" - typical Mekboy sales pitch