I've read your other thread on the Enduro, I'll attempt to answer both here. First, be in no doubt the enduro is one of, if not the best "do it all bikes" ever. Bar none. Especially if your "do it all" involves proper technical terrain.
The fact that it is long shouldn't be a hindrance on slower more technical trails as it has short chainstays for quick cornering and excellent balance once you learn to throw them about. I've owned several variations and loads of similar bikes.
However, having said all that, in proper aggro spec they can be a bit of a bit of a chore to pedal about all day on less demanding trails especially with heavier wheels and tires. A second, lighter set of wheels and tires for local trails and maybe a bit of shock suspension fettle could turn it into your one bike to do it all.
You could, if money was not an object and you wanted a more light duty all rounder that would still be fit for the alps I would say look no further than the stumpy evo carbon.