I doubt that the look of an AFV rates highly on the desirable qualities list. The Crusader, for whatever its looks, was pretty much a dog of an AFV. This was a light tank in production at least two years after its design should have been abandoned. It had no better armor than the American M 3 Stuart, and an equivalent gun.
Yes, the Brits did shoehorn a 6 pdr into the III model but only by making the crew compartment extremely cramped and inefficent. The Crusader was mechanically complex and unreliable compared to German and US AFV as well.
If anything, British WW 2 armor development might be summed up as "Mediocrity thy name is any British tank."