.@YouTube has become .@instagram with the new photo and text posts from subscribed channels. On one hand one may argue that it gives a better chance for creators to communicate announcements, you can't deny the fact that it dilutes your recommendation experience.
Hmm, are you talking about the Community tab? That’s how creator interact with viewers using rich media – it may also include polls, GIFs, text, images, and video. Regarding home recommendations – check this page on how to improve them: https://yt.be/help/cJiM