Me and the Mrs did it on our mains a couple of days ago, there was no warning dialogue for the inadvertant decision to side with Saurfang, which we didnt want. Last night on our Illidari’ we did the quest again, and there it is, if you want to side with Sylvanas its contained in a wee speech bubble and ‘DiiinG!’ theres a warning box. Both options should be made equally clear, not some half hearted attempt and directing folks to a place they dont want to be. It was a small retribution having the Illidari make the choice I initially wanted - which should never had been an issue in the first place had the Developers of the game had made the choice Equal in all ways.
I made a similar post the other day.