I think it could have used one more episode, but in many ways this was extremely in line with Gundam endings. Space bullshit, the ghosts of the past reach through time, love saves the world, the hero retires to a farm with their partner. Gundam has this rep for killing everyone, and yeah people get fucked up, but the general theme of the series is the transformative power of human connection. So most endings are either bittersweet or lean toward hope for a better world.