Producer Sakai and director Kimura revealed that they will no longer appear in pso2 livestreams. The official blog will also no longer be updated.

More info:
https://ameblo.jp/sega-psblog/entry-12420362594.html
https://twitter.com/sega_pso2/status...84638630334464
https://pso2roboarks.jp/sakai-kimura-last