Nah... I personally think that cavalry system in M2TW is realistic, but even with that, i sick of a bunch of well trained mongols rode their horses as awfully as the merchant cavalry militia does (it was fine to had unresponsive cav, and slow to charge when the men on top of horse has heavy armoury, but mounted archers should look more in RTW cav...
lolwut?

Heavier guys use heavier horses for a reason. They should not be faster than light cavalry, but they should not "crawl" with their horses as they do now: that's 100% unrealistic. If you pay attention to the animation, you'll see what I'm talking about, it looks like the horse is in slow mo.