I'm in favor of making weapons much more different AND make people want to carry multiple weapons for use in different scenarios.
I see where you want this to go, the pike IS too nice when you still can bring a main weapon that can do almost everything. So make it 3 slots, so they can take an inferior backup weapon (1h without shield or 1-slot 2h/pole), increase the damage of them and make them unbalanced.
Seems good?
EDIT: Oh, and add crusthrough. Wouldn't really work against infantry because of the low speed, but would be devestating against horsemen because of the speed bonus. Just to fix that silly phantom block or for when you hit them as they swirv away. Yes, I am 1h&shield cav and want this. All for greater variety of weapons!