So, here are a few points about the presentation, that are not immediately obvious:
1. None of the presenters was actually excited about what they were talking about. The whole thing was very awkward, it looked like they just don't want to be there. In some of the interviews they didn't want to even look at the camera.
2. They had no idea about some of the things they were talking about. This is more visible during the interviews, but literally, nobody had any idea how the Vanilla thing is going to work. Or the Warfronts. We basically know nothing about them. And I think they don't either.
3. From the previous point, it almost like the decision to bring Vanilla back was made like a week before Blizzcon, after some subscription numbers came out or something like that.
4. The other guy was talking about what they "could" do with the new pvp switch, and he admitted to just fantasizing and actually having nothing in development.
5. During the interview they tried to avoid questions, and then when asked a second time (thanks to the interviewers), they acted like they never thought about it, like the garrison/class hall missions.
6. The sub races start at level 20 because they don't want to create new starting zones for them.
From all of this, I think a few conclusions can be made:
1. Subscription numbers did not increase during Legion. The subscription numbers declined less than in WoD, but nevertheless it is a decrease in active and paying subscribers. The expansion did not bring many new players either.
2. WoW is their biggest project with the largest development cost and most development time, and yet games like Hearthstone have like 10 times more active players with development costs 1/10 of WoW's. Blizzard is starting to feel like the whole thing is not worth it.
3. Everyone on the team who was good was moved to other projects or is going to leave the team soon.
4. The current team knows that the entire game is on life support at this point. You can feel how tired they were out of all of this during the presentation.
5. Everything that they are doing has the exact goal of squeezing as much money out of the players as possible before it's over.