They’re undergoing a lot of internal changes and pressure. I wouldn’t be surprised if people are going to be moved around from the HotS team or if the game is about to be completely canceled.
There’s a new CFO and nobody on that board, least of all him, cares about your experience with HotS if it’s not making them ludicrous amounts of $$$, which it probably isn’t. If their new Diablo mobile game ends up being the cash cow they want it to be, there’s a chance HotS is done for. Wouldn’t even be surprised if Blizzard as a whole saw entire repurposing.
So, about your concern that devs aren’t currently spamming the board with blue posts, it’s probably not on their priorities right now. If things settle down I’m sure we’ll have more input. If not, it’s gonna stay that way for maybe a year and then it’s goodbye.