All the fish added during or prior to Chains of Promathia had a use. You could cook them, make them into ingredients for alchemy, fish up coral fragments, dredge up and repair rusted equipment, turn them in for guild points, or hand them over to Zaldon. And the fish from the ToAU expansion were basically the previous fish with new names, so they were also still used for the same purposes.
Nearly every fish added since then however, is entirely useless. They can't be made into any useful recipe, and the old fish's recipes are now outdated and worthless. They aren't used for guild points or fish ranking. You've made it quite clear they aren't even meant to be sold to NPC's for gil. Even the upwards of 30 new "Legendary Fish" that have been added to the game, only five or so are even usable by Zaldon for some sort of reward.
What then, is the point of fishing? Could you please go back and add useful new foods and potions made from all these new fish? I'm tired of reeling in mog garden nets full of fish I have to throw away, because they literally don't do anything! I'm tired of having a nearly capped fishing skill, and nothing to use it on because fish are not useful. Even when a fish is useful, you end up taking that use away. (When AttentiveIbuki required a moderately high level fish to make, for example, I was excited to have the skill necessary to get them. But then you just made them an incredibly common drop from the monsters in the area!) And why the hell are there so many "Legendary Fish" that are basically just inventory space-1, rather than a shot at some useful reward from Inside the Belly?
I ask you to please do a massive cooking recipe overhaul, changing and adding plenty of new useful foods using fish, furniture using fish, potions that use fish, quests that use fish, anything to make the hardest to level and most time consuming craft in the game useful. You overhauled the entire system to make it more user friendly, but there's no reason for the users to become friendly with it.