I just commented. I unticked the "share with google+" box. Yes, you are right and I was wrong, I do have to "go through google+" now, but I was able to post on youtube and avoided anything but an empty public profile on google+, I suppose. It's different from how it used to try to force me to log in with a gmail account. Same name as my youtube, but then I would not have access to my playlists. So, I guess this still is a bit of a workaround.