Because there isn't anything positive about what's currently going on. Some of us repeatedly post topics like these every once in a while to remind them of the core issues which are causing a rapid decline—hoping they'd finally share their thoughts or be up for a discussion with the community, but that never happens and we're always ignored. So, what 'positive' posts do we make?
There is plenty of appreciation in the update announcement topic. Nobody is giving them a hard time for the new content, it's for the lack of other changes and fixes this game requires for it to be more active and fun again.