The pure mechanic of fishing is improved the trophys are nice and the chance one fish will produce many more fish portions is excellent..

However..

It feels half done, you cant get the fishing rod (oh my what a difficult recipe that would be to make in the wild: lets see 1x wood + 1x Leathersscraps should about cover it yes?)

Hell if you think of the lore one fish in a great many could carry a gold coin and or something you could use in the new magic system if you wanted to push a point?