I own the V1 and thought to give the V2 a try. The vertical pass through, better laptop compartment, and external water bottle holder were some of the key differences that drew me to take a chance with the new one. My first impressions are these were all huge upgrades, including the larger front pouch zipper not mentioned above, but what I've found is the workmanship seems worse. The inside lining seems to be a little too large compared to the V1 creating wrinkles inside (please see their own liner fabric comparison images where it is slightly noticeable). The "waves and wrinkles" are more pronounced around the top of the inside main compartment where there seems to be an extra cm of liner fabric above what is needed. This tends too make the bag look more "wrinkly" than V1. In addition, the shoulder straps seem to have more of a "channel" down the front vs V1, not sure if this was intended. The area around the main compartment also seems to have less "structure" and is prone to wrinkling even when pretty fully loaded. There are also "wrinkles" along the top of the front pouch. I'm sure there are more examples, but you get the points. This may be the growing pains of a new version of the bag and production run and hopefully they figure this out and clean this bag up a bit.
That being said, I do think the V2 has nice upgrades over the V1, I just wish it looked as slick as my V1.
PS: there was also some scuffing on the top handle when it arrived "new".