Where's the cavalry bugs then? Bump-couching, jumping over pikes, horse's body sucking up hits when you're attacking a dehorsed rider, teleporting rider after horse gets killed, shields/blocks taking the damage even if you hit the horse model with you weapon, getting knocked down by horses walking over you, one-hiting madness etc.
I don't mind cav (except for the shields/block sucking up damage that's not even close, and yes, the teleporting), but I like how you skip over all moronic parts of cav and focus on classes you don't like.
I guess you're talking about me. I don't use long spear, I use pike. Go on a server and attack someone relatively close to you with 'pike'. I'm awaiting a video of your fails that I can use for a 'buff pike' thread 
I'm 10th gen cav and I also hate those things too. it doesn't make the class overpowered though, not by any means. There's issues abound in c-rpg (and more importantly, warband). The game is still pretty well balanced.
Let's break down your complaints:
Bump-couching - this is part of a larger issue where you can hit people who are closer than the farthest reach of your weapon. Supposedly they are going over each weapons' hit boxes to fix this type of issue. It's the same reason a pike can stab someone who's 1 foot away (or anyone can hit anyone with a weapon when a person is physically closer than the length of their weapon). This isn't unique to horsemen.
jumping over pikes - this is part of warband, it would be awesome if you could "brace" pikes, it would be ever better if all weapons had a damage associated with them regardless of whether or not they were swinging. If someone runs into your sword, they should take damage. If someone runs into a spear, they should take damage (regardless if you're swinging). This isn't unique to horsemen.
horse's body sucking up hits when you're attacking a dehorsed rider - This is an amazing change from cmp, and I think very good (in theory). Although I haven't personally seen 2 friendly melee swinging, one kills an enemy, and the 2nd person's swing hits the dead body. I'm still seeing people get teamhit when an enemy dies, the bodies just fall so fast that the ragdoll for 1 second on a dead body is really not helping at all. So I would be cool with them removing this, but at the same time, I've been de-horsed at least 100 times since this change, and I can say that I've never had an issue with someone hitting the horse instead of me. Every single time I'm dismounted, I slide 5 feet in front of the horse...every time.
teleporting rider after horse gets killed This very rarely happens (it's happened to me 2 or 3 times in my c-rpg experience). People "Slide" forward when they get dismounted, but anyone's whose played the game should be able to tell where the person is on the ground. not to mention you can physically see them on the ground.
shields/blocks taking the damage even if you hit the horse model with you weapon - No excuse for this. As a lancer cav it's one of my biggest pet peeves that someone just down blocks on their horse, and even if I'm aiming very low on the horse model, it seems like it's 50/50 chance I will actually hit the horse. I don't like the forcefield of shields or manually blocking on horse.
getting knocked down by horses walking over you They have to be at least trotting to get knocked down. You may get bumped at a slow walk, but I don't see a problem with that. Have you ever stood next to a horse? That thing could take one step forward and if you were in front of it, you'd probably get knocked down, or at least stumble back before regaining your balance.
one-hiting madness Madness? It's called a speed bonus, and it works both ways. If I'm riding at you, and you shoot me, throw something at me (or my horse) or swing and hit me, I take massive damage because of the speed bonus. Do you have a problem with the speed bonus that has been around since the original M&B? I didn't think so. Just seems like you're trying to make the list longer.
Aseplhood - If this game would have more realism in it, you would not be able to stand up after your horse dies, and throws you down from mounted.
it goes both ways. If you want to open that can of worms. In real life, if a horse dies as it's riding at you, and the dead carcass flies into you, what happens to you? You also wouldn't be getting up from that. Also in real life, you don't have to wait for a horse to completely stop moving to dismount.
