I would have voted "no", if all was perfectly good and balanced.
But at the moment, it's just so irritating to see :
-the rider falling after his horse is dead. You stab him, nothing happens. And a few seconds latter, he kills you from behind, because of a weird teleporting/invisible bug. And he's still full health, ready to whistle another horse.
-the rider falling after his horse is dead. But thanks to his shield, that he never let go while falling, he manages to "stop" the arrow you shot at him, while being on the ground.
-the rider falling after his horse is dead. But weird hitboxes makes you hit the ground instead of his head, and here you stagger, while he stands up, undamaged.
Since we have all this, AND bump damage wich is rather consequent, i vote "yes", with pleasure. And stop whinning damn cav, how many times do you fall off your horse in a round ? Once ? Twice ? Are you as heavily armored as the lads you trumple on ? Then just take this tiny 10% damage, or whatever, get up, and fight.
If you really fell in the middle of ennemies (your fault for being greedy in the first place), then you'd never have a chance anyway full life, so it doesn't matter if you loose some of it because of the fall.
PS : As said below, it's indeed already pretty nice that the heavy lance is 2 slots, even when it has an overhead that can be used on ground. Wich allows "CAV" to also be more effective on "foot".
It's always fun to watch a pikeman kill an horse, thrust once at the fallen rider, who gets up, with a mighty big axe, and chops the hell outa the pikeman. Then, he whistles another horse, and gets back to rampage. Real fact :
Pikeman > Horse. But Rider > Pikeman.
Still they are very good support too, so no reason to really compare that now, but it's always irritating to see biaised topics of cav players, even in such not-that-much-of-a-nerf suggestion. Stop lobying as hell, this was an earnest suggestion, not a "make the heavy lance 3 slots". (wich could be interesting, mind you)