Very important mod for true pikemen players.

The Empire Building Mod introduces t2 pikemen and I didn't run into this problem. Also, no matter how powerful the pikemen, you'll have a very hard time taking a city with walls, so I find that they don't fill the same role.

The stats overall of the pikemen are lower than a typical t2 infantry, with lower attack and defense scores. Considering that overwhelm is a pretty common trait among the infantry line, I believe they will still maintain distinct roles in the battlefield.

Remember that races with t1 infantry and t2 pikemen are also already in the base game, and so although it may introduce a problem that pikemen are stronger than infantry in some situations, I don't personally feel that my mod will break this balance.

Increasing the bonuses on polearm could be an equally elegant solution, running into the issue that the phalanx or grey guard angel may become too powerful against t4 cavalry/monsters, and I think that it's another good approach to the same problem.

Well now they are just better infantry, have you tried buffing up polearm, pike square? or adding special ability for pikeman only that gives them bonuses vs higher tier mounted/flying units?