If players are running in a straight line to kick you then that is the easiest kick I've seen in my life. Not only that but it's fairly easy to know exactly when their kick is coming and time a side step and slash.
Jufasto is a bit of an outlier in that yes, he kicks a lot, but all his kicks are done at a time when he knows he can't be punished in that clip. 1st one is against spear man, 2nd and 3rd one the other guy wasn't focusing on him, 4th one the inf can't risk to swing because there is an archer and cav looking at him. Been a while since I played Warband but I doubt he would have been punished in similar situations. On top of it all, you cannot block while kicking with a shield, it opens you way up compared to with a weapon you can block straight away.
Archers and cav can force kills with footshots/bumpstabs so why aren't infantry allowed to have a way to force a kill? And don't tell me "we should make spamming work" because whats the difference, both require footwork to prevent it IIRC from Warband.
Kicks obviously still have a weird hitbox as evidenced by the earlier clip(or it's desync issues) but it's far from the wonkiest or stupidest thing in the game right now.