As a longspear user, the only problem I currently see with the weapon is that the overhead goes through friendlies and can still hit enemies, through them. I only overhead when its necessary and it makes me sad to see people running around with a group using only the overhead so they can rack up the kills with no risk of hitting a team mate. Other than that, if you lose to a pikeman 1v1 or 1v3(pike is the 1), you were bested with skill as all you need to do is downblock until you hear the clank of the blocked spear... then you get your shot!
Just because a few people are very good with certain weps, doesn't mean the weps are OP.