That's what bosses do :p.
this is so true, you could even do rolling and even carrying a great sword with that.
and so the myth "knight require crane" to lift him to his horse.
but still, it just bother me that spear or polearm never made itself into best weapon in any games. >.<
Yeah, realistically speaking, the best weapon against armored oponents like knights with swords, would be weapons with spikes, like the warhammer or mace. Those are relatively easy to use - compared to a sword - and the force of the blow is usually enough to puncture the armor. A spear and polearm of course has also the advantage of reach and that it was easy to manufacture, so you could equip a lot of troops with a cheap and yet effective weapon. Hammers and maces, and to some extend axes, had also the advantage of breaking bones and damaging tissue, due to the blunt trauma, even if you don't manage to penetrate the armor. Infact, blunt traum was so effective in taking out armored oponents, using of the hilt and guard of a sword have been very common in combat and training, known as half-swording.
There really is a lot of missconceptions about armor and weapons, not just in RPGs, but movies as well, where you see swordsman cuting of limbs, penetrating armor left and right, like it's not even there. What I hate the most in RPGs though, is how they try to balance armor, by making you incredibly slow and tanky. But, the real disadvantage of armor, is awareness. Or least the helmet. Hearing is very muffled and your vision extremly limited, it's always a question of protection versus awareness. It would take also a lot of practise to make effective use of armor in combat.
Or this idea that the bigger the sword is, the slower it must be. A two hand sword, is huge. It must be slow as fuck! Right? Wrong. The weight difference between a two-hand sword and a simple one-hand sword, isn't very large. In combat both weapons had more or less the same speed, particularly as many swords could be effectively used with both hands. I think Dark-Souls has a very nice system here, where you can use weapons either with one or two hands, depending on what ever if you have a shield or not.