From a frequent pax perspective, a couple of thoughts, if I may? I won't comment on servicability or front-end ergonomics and whistles and bells.
Having been invited to see inside the S-92, the school-bus style seating layout looks uncomfortable. The EC aircraft seats, which in many cases are offset from adjacent seats, offer an opportunity to stretch your legs.
A stand-up cabin isn't that attractive - once we're strapped in, we won't be wandering around too much. While the EC cabin may be cramped, again we're unlikely to do much more than grab some kip or read the Daily Sport. More serious an issue is having an adjacent window large enough to double-up as an emergency exit.
Vibration levels from a five-bladed head appear to be much lower than from four blades, which is particularly important from a passenger perspective on a long sector. (I have a susceptabilty to vibes, after 1000+ hours on Lynx, and I've only recently weened myself off Brufen after 10 years, so alighting at journey's end without buzzing knees is important to me).
A/c in the cabin has never been a problem, at least in the North Sea. If we want more, or less, the request has never gone unanswered when bleed-air is available. I'm sure an efficient a/c system would be welcome in warmer climes. A new job in Oz beckons, so I may well find out soon.
We work in an environment where we are constantly considering risk v probability. Having the fuel cells under the floor doesn't appear to be an issue that gives pax cause for concern. I has to go somewhere, or we don't get home, is how most of us would see it.
Thanks for the indulgence of intruding - please continue with the entertainment.