I loved mirrors edge personally, it was a great game! i didn't get why it wasn't more popular, it even had a half decent storyline and everything! i probably played it through like 2 times. but i want skyrim to be skyrim and not prince of persia.
I liked mirror's edge too, which is why I bring it up, because it has a lot of features and game play people ask for, but in reality don't actually go for... I just think this is Skyrim, it's not Assassin's Creed, it doesn't need Parkour and that in fact Parkour could feel decremental to the way the game feels.... it wouldn't feel like an adventure game, it'd feel like an assassination/stealing game... which it isn't. They are still parts of it, but they shouldn't dominate the game, they'd take too much away from the rest of the game. More so when it's just unrealistically silly of the time, thatched roofs and roof tiles aren't meant to hold people, you'd either fall through the roof or break/crack/dislodge parts of it, what certainly aren't stealthy... and to finish it off, unless you have flat roofs (and skyrim is pretty cold, I presume a lot of snow and rain and so unlikely to be flat), you'd also have a hard time just standing on such a roof.