Yes, WW2 cavalry sets in 1/72 would be nice. The German and to some extent the Italian set available depict giants. Other than them, I can only think of the Revell cossacks.
But let's face it, cavalry charges were a very rare thing in WW2. The Polish did not attack German tanks with horsemen. About the 1942 "Savoia" attack, I find it difficult to accept the idea of cavalry attacking anything with hand grenades. A horse might be fast but you don't want to be near an exploding grenade while seated with your head 2 meters above ground level.
These sets would require much thinking about the poses. Waterloo1815 did well with their German giants in this regard. Riders scouting, dismounted observers and fighters seem the logical thing. But would they be as attractive as the saber-wielding standard? Regards, Pa