Remember that "Husaria" as Polish heavy cavalry operating from 1500-1800 are quite different from many units called hussars under other nations - after that hussars remained on the battlefields fielded by other nations, while Poland was partitioned and, well, didn't field any armies anymore.
The heavy cav set from WA isn't 100% bad as the base, but differ enough to make creating the most iconic look of the hussars quite difficult:
> Mentioned trophies from exotic animals, usually worn across the chest. It seems quite difficult to sculpt or made from other minis. Unit was formed from nobles that was required to buy their own gear, so they wanted to show off a lot. Obviously, it's not a part of uniform nor everyone would wear it, especially during a battle, though at least 1 body with such accessory would be welcome
> No puffed sleeves in the mentioned fashion. It's really out of place and while full armoured arms could do a good job, it limits your options quite greatly.
> Hussars armours were often the best what could be bought with money, with a lot of moving parts, interlocking layers allowing them to move easily. It's other part of the "look". The set doesn't seem like the case, presenting early Renneissance type of plates.
Last thing would be helmets, keeping the style pretty much across the ages and wings, that aren't really hard to sculpt or print.
Also: Not a historian, maybe an armchair one at best. I don't say that's impossible to made Polish Hussars with heavy cavalry set, just mentioning an upgrade frame that covers all bases (so, torsos, arms, helmets, accessories) would be way too close to a new sprue. I believe it's also doable with just wings and heads parts to make a convincing unit for a battle game.
Furthermore, I also can be skewed with the most modern version of them. It's also debated if they've even used wings outside parades.