Except for the fact that Gladiators def is still better then Marauders, as well as their HP.
Now it is a matter of them balancing the shield block rate. Would be nice if by default it proced more then parry, and evade, but as it stands, we now have block, parry, and evade, while Marauder only has parry and evade (along with pugilist).
I have to admit I am greatly saddened by the rarity of it (haven't gotten aegis boon to proc once, and deflect only a couple times, I even forget to use them now), but they are still more defensive abilities then Mrd.
And the fact that I have 3500 HP is pretty insane.