I'm very interested in 5E and eagerly awaiting the playtest. Still, I can see where people are having problems. I think Wizards should either start the playtest, or stop talking about D&DN until they're ready to start the playtest. This business of dribbling out vague and confusing information is not building enthusiasm, rather the reverse.
Except that not saying anything about it would still generate just as much unfounded speculation, demands, and complaints.
Saying nothing and saying something would accomplish the same exact thing. So they might as well say some stuff because there are people who are genuinely interested in what's being bandied about, and won't jump to ridiculous conclusions and make "definitive statements" about it (that we all know to be so much hot air because they have over a year and a half to eventually change their minds.)