As a Horde member I'd probably be less disappointed about the events of Darkshore if I hadn't seen the BFA cinematic before
Apologies in advance for my broken english. You should probably read something else as you've probably read everything I'm going to say here in better written english somewhere else.
The entire BFA-cinematic wanted to be as neutral (and I guess pandering) as possible to both factions. I didn't consider this to be a bad thing and ended up cheering through the entire thing. But had the mystery around the burning of Teldrassil not been a mystery... I would have seen the BFA-cinematic with completely different eyes. They kept it a mystery because Legion was still kind of going on (I guess) or rather because they knew there would be backlash.
It's really bizarre to revisit this now with the new context. I (like many other Horde players) cheered during that Blizzcon for Sylvanas as she went into Banshee mode and yelled "For the Horde". The premise of the cinematic sparked the hope that for once the Alliance would actually be the aggressor and Sylvanas would embrace the Horde rather than plotting something for her personal gains. And that's kind of the thing: none of the people that say that Sylvanas isn't acting out of character in Darkshore are wrong - it's just not what I personally wanted to see and what I was expecting/hoping for after having seen the cinematic. (It's worth noting that I don't think that writers should do what the fans want - that's not my point.)
Saurfang not stopping Sylvanas from burning the tree down is one thing, but then also cheering for her later on when she yells "For the Horde" just seems so... I don't know. Without the context of the burning tree I always thought that this was supposed to be the moment in which Saurfang fully accepted her as the Warchief, but *with* the context this entire moment just feels weird.
That's all I wanted to say really. If I didn't feel like Blizzard had deliberately lead me on during the last Blizzcon, then maybe I wouldn't feel so gutted. Or I guess I'm just stupid for having watched [Banshee Mode reactions](https://www.youtube.com/watch?v=9dwcp1CND-M) over and over again. I certainly don't want to watch those anymore. =/