Blizzard devs are not obligated to comment on anything, no matter how many 1000s of replies the topic has. Most of those are the same 10 players in an echo chamber.
Someone else nailed it. The community here is rabid as hell. One sentence or word can be taken out of context, twisted, constrewed and it create a nightmare for everyone, devs and players. If they reply to a thread saying they dont like an idea, or arent looking at someone, or something like that…people would FREAK OUT. People already freak out when they dont reply, imagine what people will do if they did?
They know the forums are nuts and will take anything they say out of context and they are smart by staying quiet most of the time.
At the end of the they day they are just not obligated to. We dont work for Blizzard and none of us have the privileged to know what they are working on daily. They will respond when its warranted and necessary.