Thanks for the context! I played with the blinds down, so I wasn't aware of the retcons made to him. Sure, it would have made sense for a druid to stay behind in Reithwin to make sure everything returns to natural balance. I was still glad to have him around for Act III. I mean, you don't have to drag him along, do you?
I also didn't know dragonborn went back that far! If they originated in a different campaign setting, it does make more sense that their Torilian pendants felt forced and being their own bubble. They sound a bit like a simplified version of Dragonlance's Draconians, which were created from the eggs of dragons by the followers of Takhisis/Tiamat. In the original lore they're usually evil-aligned and not available as a player race.