Loa are always powerful compared to random mooks, but that doesn't change the fact that Kragwa had to break down some of his sacred offerings to even acquire the power to do that - he's shown to essentially be on his last leg, though there's hope he is recovering now that he's acquired a new high priest and is no longer under siege by the Blood Trolls. I also doubt the Zandalari would resettle in Nazmir, but that wasn't what I was originally responding to, either - @LemonDemonGirl pondered if Bwonsamdi likely rules over Nazmir now, and given the updates over the course of BfA and Shadowlands, I generally agreed with the theory. Except for his adherents, I doubt the rank and file of the Zandalari want much to do with him personally.