So people who keep up to date with changes are basically out of luck if a lot of people are clueless about something that happened months ago (taunts) or can be found on recent patch notes (tank leg armor)? Why is a question about dpsers HP in the tanking Q&A?
Being able to say "We just go with what's most popular" works well, I guess, but some editorial oversight would be nice too - I know people over on the tanking forum put a lot of effort into crafting questions on susbstantive issues they wanted some insight on and seeing our Q&A taken up in part by trivial questions was annoying, made worse by the fact that even the better questions weren't answered (as others have outlined above, it's not even political answers, it's flat out non-answers).
It's been said that the developers value productive, useful feedback about problems or issues people have. If so, why not move these sorts of Q&As to their respective forums, at least, so you might get a better sampling of what is worth looking into? As it is, if we're leaving the questions up to the whims of people who apparently missed out on mechanics for months, and the questions aren't likely to be answered appropriately anyway, what's the point?
This is basically how I feel about this. Of all the legitimate issues the tanks have, and they're all well discussed in the tank forums, these are some preeettttttttttty awful questions, to put it lightly. We don't care about DPS HP. We don't want questions asked that were changed months or even years ago. You don't have to answer questions based on incorrect facts (5 tanks in BC?). You don't have to answer questions about easy fixes you plan to put in the next patch, such as the new leg armor.
We want answers to issues that make a big difference to us. We got non-answers to some of the good questions that were asked, and factually incorrect answers to others. A lot of players, tanks and non-tanks alike, feel like it was a total waste of an Ask The Devs Q+A session.
So what can we do to improve this? As Lesaberisa posted, the class forums, and I guess the role forums for this issue, can play a part. Give us a warning about what the next topic will be in advance, maybe by a couple days, and the class and role forums can think of good questions to ask. Maybe the OP of the thread, ideally a knowledgeable member of the community, can edit his or her post to add the best questions asked, and then those questions can be taken up by the developers to answer. Or they can be asked in a standard Ask The Devs thread, and then the individual questions would be upvoted by the community. Maybe Blizzard could make a poll thread asking which of the listed questions asked in the thread in the role/class forums the community would like answered.
This also mostly solves the problem of not being able to ask a question because you were at work or school or otherwise busy that time of the day, because the window in which a question could be asked would be extended to a couple days rather than the ~5 hours it takes to cap an Ask The Devs thread.