I would have liked to see the Empire pwn the Rebels with a huge attack — a big part of their philosophy is the en masse approach and inspiring fear — that's why they like big ships (miles-long Star Destroyers) and lots of them (TIES are cheap and disposable but they attack in hordes, as we see in ROTJ and now ANH:R).
But I understand Ady's point of view — from a story point of view, the Empire's even scarier if they can pwn the Rebels with just three walkers.