True enough; philosophically, I am still in the BY camp (a.k.a. BSD/MIT/etc.), and I do not particularly care about the NC part, but ND is increasingly important for non-code. But if they could do even the BY properly, it would be a step to the right direction (and, to some extent, I think they're doing that).
ND is important for those who do "authoritative writing" (for a lack of a better term); i.e., when you write with your real name, you do not want nonsense and disinformation associated with your name.
Yes, I think of it more in the context of photo and video integrity, but you can certainly imagine an unscrupulous individual rewriting something and changing the meaning. Of course, I doubt a license would stop that person.
Not really. You're supposed to attribute the original creator. And if I did make major changes/additions I'd find some way to flag that. But you don't have a Github-style change log.