The Backpacker review is pretty much fluff. Here's what you need to know:
I'm a six year Bora owner, and I love it. Carries better than any pack I've owned. That being said, the Altra suspension (used first on the Naos) is superior, hands down. It puts that weight in the small of your back, spreads it onto my narrow hips, and is downright comfy.
That being said, loads over 50-55 pounds, I might still use my Bora. And the material on the new Altra is definitely less durable (and not waterproof) than the Bora. It's another $50 and 9 ounces for the Arcteryx pack raincover, fyi. And as the Backpacker written review correctly points out, the zippers on the main Altra U compartment are not waterproof. This was a mistake, and I bet Arcteryx fixes that within 1-3 years.
Also, the Altra lid is not removeable to make a fanny pack, like the Bora. Still, I have my Altra on order: the suspension is THAT good and the weight savings are substantial. But my Bora will keep a place of honor and cannot be replaced for its overall durability.