Ye you are right, but like you said they could have atleast make it look to us like they are putting Sylvanas into a certain state or trying to win information from her, but nope we are left in the dark with nothing to grab on. It feels like a horrible cliffhanger like these tv shows with several months in between. This is not how you win players/viewers what ever. How about giving us some teaser some hints, anything would have been decent.
I remember when they said they were actively looking at loose ends and tips of icebergs to speculate on.. sadly we didn't got any of that.
I don't count that half assed first one bits that came out of the blue.. with some statues which are appearntly important.