So that's what I thought when I saw the epilogue of the alliance that she will give hope to them.
the factions are going to dissolve in any way
the dialogues of the forsaken in orgrimmar clearly indicate that an important change is being prepared for the race
Forsaken Refugee: How could Sylvanas abandon us like this?
Forsaken Refugee: She's never been loyal to the Horde.
Forsaken Refugee: No, not the Horde. Us. The forsaken. We're her people.
Forsaken Refugee: Not anymore
Orgrimmar Grunt: You must be saddened to see Sylvanas leave.
Forsaken Refugee: Why? Because I'm Forsaken? Did you shed tears for Garrosh because you're an orc?
Orgrimmar Grunt: No... I shed tears because he brought shame to us all.