Much better than previous, but there is still fundamental "problem". Every time I check the "For You" -tab more than half of the recommendation I have already watched. In fact I have added those to my Library into different Playlists or made them BYOJ videos. I think SLR should improve algorithm not to show videos you have already added to your library playlists.
Other way around is to make still one more feed/tab. We can name it "suggested but not watched" -tab. This way you can retain current feed mainly for new users and "advanced new feed" for old and long time users. This way both groups would spend more time with SLR finding new and suitable videos to his/her own taste.