I think they should just remove the got away mechanic. You should ALWAYS catch something, but what it is get's better as you go up. Definitely needs rebalancing and maybe add fishing-exclusive loot so theres actually a decent reason to grind.
Something I Completely forgot to highlight in my post are gear limitations, each outpost would have accessible to a max gear volume, in the form of chain, iron and diamond for each outpost.
Thanks for the support