Lion's Arch Aquatic life.
Lion’s Arch still has aquatic life. The Quaggans still have their village, so why remove them from their homes and why aren’t they back? It makes no sense.
The water was poisoned by the Miasma, so one would assume that they didn’t really want to stay there. There’s also the drill not so far away, I don’t imagine they would want to stay somewhere that has a constant reminder of what happened – some of their friends and family were probably killed. Not to mention the fact that the rest of LA is still destroyed and not heavily populated meaning that trade wouldn’t be so great which would make living there harder.