And I don't know why it has do go from not looking at even a single additional item or viewable (as per the videos), to seeing every single one. There can be a balance in-between, which I'd imagine most players will fall in to.
Regarding the bolded, it depends. I don't judge a games purchase viability entirely on the length alone, though it is certainly one of my considerations. Metal Gear Solid is one of my all time favourite games, and I believe it took me around 6-10 hours through my many different play throughs. Not saying The Order will be in the same stratosphere of quality (I'm actually expecting it to be good to very good, not near classic), just making the point that length doesn't necessarily dictate quality, or purchase value proposition. More important than how long a game is, is how much I enjoy it, how fun it is, how likely I may be to replay it etc.