That's totally fair to some extent, but I feel like the entire opening part of the reveal where they discussed how important player feedback was to shaping the direction of WoW overall is a little... empty when they refuse to provide us with some more juicy details so we can provide that feedback.
I totally get not wanting to elaborate on content that is Pre-Alpha, but why not at least give us some more information? I think it would be better for them to give the players a general overview of the talent options that they are thinking so that class specialists can break it down and provide dedicated and useful feedback before they get so deep into development that it's too late to make dramatic changes if the community comes up with some absolutely amazing ideas.