Personally, I think it'd be a better place in general.
I may sound like the son of Jack Thompson here or something, but there are certain things about the Internet that just mess with people's heads. WoW is one of them, and along with WoW is 4Chan and a number of other places as well.
I'll admit, a vast majority of us are strong-minded enough to use WoW in moderation, responsibly, however, WoW and 4Chan are a couple of those things that takes some people's minds and gives them a good brainwashing.
The worst part is that it's not just some screwed up, biased opinion I have here. I actually know or knew people that have had this happen to them! I used to know people who were completely normal, started to visit 4Chan regularly, and now I can't have a normal conversation with them anymore! I also knew people who started playing World of Warcraft, and they get so wrapped up in it, and possibly the friends they make on it, to hold a real conversation with me (if it's an Internet friend), or they just never want to hang out anymore.
Then there's the people who just lose so much sleep and all the time from it, become less productive or less social after they begin playing.
And again, I realize this probably isn't a majority of players, but it's a shame that these things happen to these people. What makes this whole thing even worse, is that I think it happens mostly to intelligent people. People who could be spending their time on such a more worthy endeavor than the grind that is an MMO.
Lastly, it's not just WoW I despise for this. It's all MMOs. I know how tempting the whole thing is, I have tried a particular MMO (Ragnarok Online to be specific. I owned a *censored* that other people played on.) before, and now I know to stay away from them.
EDIT: I'd like to say that I don't disagree with anything but the last sentence in the article. I think everything you said was right. However, to me, those things seem small and insignificant in comparison. I suppose that is a small personal bias, though.