These are all obvious points to use feral charge and all times which i expect every cat would do it, what i think the question was and what i was at least saying is its not viable to do it at any other point. for example when the orb is bouncing on zon'ozz you can run out and charge back in or on yor'rsarge you can because you either need to be spread or stacked and leaves no time for leaping (other then running to blobs etc)
But I agree with Mihir and all those times to use it, but that should be common sense. (when far away from your target leap?)