Implied? Implied?? What is this noise? Even if it was explicitly stated, I am sure the season pass has the disclaimer that the terms can change without notice.
I don't appreciate people who like to act like they can speak for other people. I fall within your criteria, and yet I don't care. In fact I am excited that the new content may be the survival mode I have been hoping for. I don't carry the entitled attitude so many whiners online have. As well I know that the value of the package can not be judged until the content is actually out.
People that bitch and whine over every little thing are tiresome. I have played for hundreds of hours and got more then my money's worth. When the game gets tiresome I'll enjoy the next game, and move on quietly.