A lot of personal story parts where done so very right, eg, the epicness of that battle on Claw Island, but this part was done just so badly wrong.
1. Its supposed to be a vision, so, why do you fight in it? You’re not supposed to be able to interact with a vision, unless the Mother was trying to kill both you and Trehrne and she was actually the threat to the world all along, with the Elder Dragons being her puppets.
2. Instead of a vision of hope for the future, where Trehrne guides the armies of Tyria to victory against Zhaitan, the vision actually shows him and the rest of the Vigil army pummeled to death by an army of the risen, and you alone left alive and cornered. Really ruins the experience and immersion.