I'm pretty disappointed with this class, especially when compared to what was added with the commander. I don't understand why they don't have expert training in armor at level 1, even if limited in some way. You would think they are the Defensive version of fighters, and since you are probably taking damage from intercept strike regardless of your ac, and taunt cancels it out, I don't see why they wouldn't have expert.
Intercept strike also seems pretty weak, with the limitations of reactions and requiring adjacency. I would think it would have something like mobile protection by default, and then have mobile protection be buffed.
I also think ferocious vengeance is a little weak, or at least, the crit resistance seems required as is (does this stack with chain armor?), because to me, there doesn't seem to be enough self sustain (at least at earlier levels) for a class that wants to take as many hits as possible. It's also disappointing this choice doesn't seem to have any further impact, there are no feats that I saw tied to it, and it's not significant enough to really affect play-style, so it seems underutilized.
Taunt is cool, but this class doesn't seem defensive enough for the role it's trying to play, and most of what it has in early defensive feat options are just bastion feats. I honestly wouldn't mind that the feats are more support and cc than self defense if the base class features/ac were more defense focused.