The Pike is currently being held at a inaccurate position. Just look at this:
visitors can't see pics , please 
register or 
loginOfcourse it would add more range. (I still feel its still too short perhaps)
Also generally to balance pikes:
- Make it 3 slot. This would mean that only dedicated Pike users and support guys would use it. 
- Only make it block stabbing attacks. This way a Pikeman would have to use his sidearm in a one on one duel but would be able to fight against other Pikeman.
- Add Pike Brace for Pikes: 
http://www.youtube.com/watch?v=klw_ydLOvFYThe Pike Brace also supported by manuals: 
visitors can't see pics , please 
register or 
loginThe Pike brace would stop cavalry and possibly damage the horses as well.