Well it depends how these hours are filled. I mean some rpgs out there take more than 60 hours, but doing what? Navigating through the battle menu to select your strongest spell and take down an army of trash mobs that you don't really feel any fun slaying? The quality of these hours matter, the non repetitivness etc...
For example I've rented Catherine, beat it and then bought the collector edition because the 10 hours it took me to beat where fucking fulfilling and it became my favorite game to be replayed again and again. I must say though, 5 hours is just too short, and the Order doesn't really strike me as that amazing a game for it to be really worth 14$ an hour.
However games can be way too long sometimes. I have a large backlog and like to be able to move on, which is why I'd say 25 hours plus bonus content is the perfect length (not that the games I actually play are anywhere near that short, but I wish they were sometimes)