Hi Happy.
I´d say it is due to the fact that we are reaching the final stage, pairings are bound to be ultimately adressed this time, for the better. Also, we´ve been very comfortable the last couple of weeks because we haven´t recieved any kind of pairing development since 457-458-459(well, if you can even call to what Sai did as "development" and how it made Sakura cry of
joy and
euphoria for the "discoverment" of Naruto´s feelings, 457 I do consider it as NS´s only development in Part II)
Some members felt a little nervous, specially Vermilion. He is very proud and stubborn in what he believes and he had a hard time coming to accept that 457 had romantic innuendo(but I must side a little with him there, I know romance when I see it and that scene of Naruto seeing Sakura walk away didn´t made me feel anything

) He only expressed his doubts, but later everything calmed down.
It is natural to feel anxious regarding these, we are about to face the moment of truth and since we are all humans, some just showed their insecurities. That´s all. Believe me when I tell you that he atmosphere that we had in ANS FC when 457 came out was way more gloomy than the one we had this weekend.
I feel fine so far. Kishi is not the best mangaka that has ever lived, but he follows a pattern and I trust him. I´ve made a post in ANS right now exploring a certain possibility of how Kishi might troll NS in the next chapter.
As for the Juubi, I doubt he took it out from fanfiction because I´ve heard that for the company in which Kishi works for and takes care of selling his manga does not allows him to read fanfictions.