I take it personal that I haven't received an invite to any betas or alphas since HotS. I started playing in Wrath, which doesn't mean I've been around for an eternity, but does mean I've been around for much longer than a large majority of the playerbase, and I've been a customer since 2002. In my eyes, my demographic is the one fleeing the game in droves, and rather than seek my input, or the input of those like me, they ignore us and continue to watch the subs plummet.
The best expansion was the one I got a beta invite to. (That's a joke btw, I'm not implying that I helped make it the best by simply being there. Hawkeye is the best Avenger)
Essentially what I'm saying is that they are targeting the wrong audiences with the beta key handouts, or perhaps they aren't targeting any audience in particular, but veteran players, which could or could not constitute me depending on your definition of the word, should be THE focus. Virtually everyone acknowledges that the game was better in the past, rather than the present, and talking to players who actually played in those eras is what Blizzard ought to do.