It's unfortunate that it isn't in the game if the tweet is true (I haven't looked it up. I avoid twitter--it's a disease
) But like a couple others in this thread mentioned, it would be a great throwback to Daggerfall. And as a hardy barbarian who lives in a rocky craggy place, one would figure climbing would be a great advantage for many reasons. I'm not talking Assassins Creed style, but at least some form of climbing. Can't climb sheer rock faces, there has to be a surface for it--craggy, hand holds, etc. Climb sides of buildings, climb interior walls to reach rafters and such to pick off wandering oblivious baddies.
I say yes, it would be nice.