I had a 2013 7200 and really didn't like it particularly well. Once loaded, the 7200 just felt too saggy and floppy. I thought the material was a little too limp that even when compressed it didn't offer enough resistance. It seems like the addressed that this year on the Pro though with a 500 denier vs the 180 (I think) they used last year. 500D seems to be fairly standard in the industry on lighter weight packs. I know Eberlestock stated they used 1000D because of the minimal difference in weight over 500D that helped make their stuff bombproof. 500D seems like the minimum for my personal liking. I should also mention that part of the floppiness was certainly the frame. I think Kuiu stated that the frame "moves with you". That may work for some, but I thought if felt like a friggin' wet noodle on my back, I hated that feeling. Worse than any older, much less expensive pack that I have had. I feel like I got duped as an unpaid or unrewarded beta tester. As mentioned prior - how many generations is it going to take before they get it right?
I have an EMR II now and while I think there is still room for improvement, it is far and away superior than the 2013 Kuiu. Maybe they got it right this year, but who knows. It kind of whooped me off their products. Who wants to pay them to test their products for them after all? I'll continue to wear the clothing I have of theirs and I still have the Zamberlan Pamirs and like them very well, but as far as packs, tents, sleeping bags, etc, I'll leave those to the specialty companies.
FYI, I design and manufacture products in a totally different market but I make damn sure they have the bugs worked out before they hit the market or I pull them if I miscalculate. I give significant discounts to my beta testers to help me assure I have them right before hitting the market.