I like the class, very Final Fantasy. In previous editions these kinds of melee oriented feats would be too over the top, but now it fits right in with the level of amazing things other martial characters can do. It is a hybrid class for sure, with a few defender traits (Roundabout Capability) and a striker/controller feel as well. Combined with some of the polearm abilities I would say this is a character welcome in any party.
Nice work!
As an aside, would this class be representable by its own paragon based off of a fighter?