One of the problems I have the the adventure touring bikes, is the tall seat height. I have a 30" inseam, and I don't want a bike that only allows me to touch with my "tippy toes". I had a friend who owned a V-Strom 1000 that he and his wife had ridden double on a 6,000 mile trip out west - and when I took it for a ride I could only touch with my toes on one side of the bike at a time! (He and is wife are currently looking at a Triumph 800 Low that has a low seat height and is a potential candidate - however his wife is concerned that the tall pillion seat on the low model is going to put her up high into the wind.
The other issue that is of concern is the wind protection and seating comfort for my wife. On the ST1100 that I had the seat was long and I needed to sit up front near the tank as I am short....and she would sit back and lean against the top box for back support (no handlebars to hold onto), and being all the way back on the seat allowed her knees to be less bent and more comfortable - the problem is that there was about a foot between us and the wind would get between us and beat her up - I could hear the buffeting wind over her helmet radio and it often sounded like she was being hit by a hurricane, and the situation was the worst when there was a cross wind blowing. The R1200RT with the adjustable screen allowed me to raise the windshield when we were on the highway and keep the wind off her, and then lower the windshield when we were in town and wanted a bit more air flow. (It doesn't look like the adventure touring bikes provide a lot of wind protection.....although there may be optional windshields that could help).
When considering providing "all day" comfort for the passenger......I still believe you need to buy a large sport touring bike like the Concours, FJR, R1200RT, Goldwing, etc. before you get a passenger seat/peg location that doesn't fold the passenger up into an uncomfortable position....I have posted a photo of a Versys 650 being ridden double......that just doesn't look like rider comfort to me (my wife and I are both senior citizens and not as flexible as we used to be).
And lastly.....the Adventure Touring bikes just don't visually get me excited.
And although I might like riding a crotch rocket...the public image of being a potential "Squid" doesn't appeal to me....and the current naked bikes just aren't "pretty".