Yeah, there is a lot to be said for ISO-lateral movement, this is why lunges are the craze, you get mobility and stability at the hip, but we don't like lunges I don't see the benefit with extremely heavy weight.
I think a beginner could possible cut their teeth on the lunge, then leave them in the dirt, to go onto the walk, but then again may as well just start walking?
I think squatting Leg-pressing or deadlifting and farmer's are no brainers.