The ability works that way because it does a lot of damage if all 6 At nades hit. And it does not make it useless at all, they have camo. Its meant to be used as an ambush ability
You also still have hoorah which also helps with seeing setting up the ability. But camo + hold fire is how you really use it, that way the tanks get close enough
Overall the commander isn't the strongest, but he can be very very potent in an arranged team ( i use him a lot in 3v3 AT)
