I suggest you translate this post to Japanese for the JP Forum General Discusson, just so you're sure the devs see it since it's common knowledge they will read those.

Show them the graphs, let the criticism flow, don't let naysayers push you down.

The game is suffering, communities are suffering due to the horrible writing quality of the latest expansion, friends move away from playing the game for months or permanently. People don't want to engage with the game in its current state and it's felt by everyone.