why would you give fighters a reward that's not an upgrade? compared to other classes part 1 . since the quest line of KA gives you a shield (that you had to complete to get your 2.0 quest ) don't make sense the reward would be same item of lesser quality
The beauty of the first reward is that it provides the benefits of the proc to your secondary ethereal shield without having to wear the reward. Basically a free added buff to your KA reward - that's pretty cool.
Basically it just adds the worn effect of the quest reward onto your achievement offhand. For example my bruiser's weapon:
While its not that exciting that the rest of the classes got an item for a slot that actually is an upgrade for most folks, the "absorbing" of the effects was a good enough reward for me. That and, the following rewards after quest 1 are great and usable. For me, this is one of those "pick your battles" type scenarios.