The fish change only works on Archi / WW. Is a nice boost on these maps since you can stay in the naval techs with Aquaculture next.
But on Lakes/Conti, many of your cities are inland, which makes the fish more of a nerf. Your other cities will need Organization / Hunting, and Aquaculture will need to wait.
This makes Aqua more powerful on water-dominant maps and less powerful elsewhere, which makes for a stale meta where you either always see Aq on a map or you never see them.
Moving Atolls to Aquaculture is enough of an eco boost, and already contributes to their map dependency. The fish change puts it way over the top for me.