Retiering the Classes (PF): Barbarian, Bloodrager, Fighter, Cavalier, Samurai

[upho]

Their ability to share multiple teamwork feats at a time, and the flexibility to swap from a library of them on the fly, doesn't come online until level 17(!). Meanwhile, their animal companion enabler is both fragile and hard to replace.

This. Main reasons why cavaliers are largely restricted to their ability to deal high single-target charge damage and are relatively easily robbed of that ability.