I've always played RPGs and back on the Playstation and PS2, those used to sell themselves on their game length (story + sidequests), I think in the grand scheme of things, they're actually getting shorter or staying the same length for the majority (games that sell themselves on mass content, modifiable games, basically Skyrim are exceptions).
That being said, I actually prefer short games now, even a lot of the RPGs that come out today are too long. I want to experience them in their entirety and I just don't have the time for it anymore, part of my enjoyment of Journey was that the game could be completed in a few hours. I'd rather have a short game with a good, solid story and a little bit of well thought out exploration, than a long game with hours of mindless grind quests and padding.