Well, Roger has always been a fan of packs that meet his standards of slick-sided "Europeaness." To each his own. I actually like the American-style packs with external pockets. Odd that- I'm an American. Go figure. I guess this pack isn't a BAD example of compromise between Americaness and Europeaness...
I find that having my water bottles in side pockets where I can easily access them on the go is very helpful, and to me- clearly- stowing them in the pack where they have to be dug out at every stop is absolute madness. I'm sure that those side-pockets annoyed Roger to no end. I like stowing everything that ends up wet (rain gear, shelter, wind jacket) in the front pocket where it is easy to pull out and throw across a bush to dry later. It can be mesh or solid- no opinion. Plus, then when I actually make camp it is easy and quick to pull the shelter out and set it up.
Clearly, I'm not one of the true UL fanatics, or I wouldn't have sold my Ion.
But, oddly, I detest internal baffles that divide the main pack into different compartments. That can only harm packing efficiency- I cannot conceive of how it could help. I do, however, understand how it would be helpful as Roger said for "European-style" hut camping where the only thing you really need to pull out at night is your bag. That's definitely a small minority of my treks, though. Some day I'll ski the 10th Mtn Div huts, but that's different.
(But I also detest seeing packs carrying twenty pounds of "external cargo", and with the mug and cookset swinging and clanking on carabiners. Ew. Find a pack that is the correct size.)
When I need a larger and more full-featured framed pack for bigger loads I'll stick with my 58L Osprey Exos, which has the added benefit of weighing about a pound less. OTOH, if I were doing "real" winter high-alpine stuff I'd go trad enough to fork out the fortune for a McHale. I know a bit too much about hypothermia, frostbite, hypoxia, etc., to fool around in that environment. I think that's where bombproof and heavy loads are the minimum requirement for even borderline safety, unfortunately. (Including, yes, a pimp for Roger's beloved tube tents, among others.)