Right now, the current mode of detonating or "touching off" explosives is clunky, doesn't feel right, and forces you to detonate everything at once.
This is troublesome when one sets up claymores and charges to do obviously very different roles.
(Claymores, for one, are far better than mines simply because you control the detonation. This is especially true when holding up indoors. See: Building next to the Aircraft Control Tower in the airfield.)