1. would mean the achievements that require certain fish to be caught x times are more difficult if spectral current can be triggered too easily, ik its probably best to just go as 8 alone but still. Would make it really impossible to try it while not in premade.
2. Well you also get a bonus if you get all fish of an area, if the party isn't using different baits they won't get that bonus. Easiest way to fix that is what we have now, you can get all fish almost by every bait. If you make certain baits only for certain fish, random parties will lose out of that buff more frequently (especially if somebody shouts USE X BAIT)
3. While I agree that some fish should give white scrips aswell, I don't think you want specific target fish for the normal fish because see point 2. You will reduce the chance to get the area bonus for people trying 10k for the mount.
4. Yeah they should be nerfed.
5. They do those kinda achievement systems sadly rather often, with the achievement that requires the most work giving the least or no reward. I'm not a fan of achievement points system either, it doesn't feel rewarding at all, if you compare it to other similar games. The certificate shop can never catch up with the current potential highscores.
6. Another currency tab just for fishing? While we have white and yellow scrips? I feel like devs wouldnt like that idea, while I get the idea that more points should actually reward you more.
7. I hate too that you basically need the right weather and daytime for some to even get a good shot at it. I would prefer a separate dutyqueue for those achievements that force the right weather (when the right routes are available that time) but make other objectives unobtainable. It is a serious timesink and annoying to setup, similar to eureka making a group for BA without discord organisation
8. While !!! superhard tugs exist in normal areas too for normal/grey fish or minions, it is not really nice ye.. If people use ocean fishing as first time experience as fisher, makes them wonder what is so special about !!! if you get some trash fish.
9. and 10. I managed to start an attempt at like 35-40s left in one duty. The fish started biting at around 3-5s left. I still caught it but the points didn't reflect it as loading screen started. So yeah it is bad.
Giving people a reason to stay in the duty and not leave when the timer is getting too low would be achieved by getting an "overtime" when triggering a spectral current.
11. Trips don't have to be hourly in my opinion. Idm the current system, it doesn't need to get spammed.
12. yeah see point 3. Should be easier way to get some white scrips if you done good. Mining and Botany are still way easier ways to get them anyway. It wouldn't hurt.
13. I think this is the mainproblem of the whole thing and probably should have been more at the top of your listing even though many already said it before. I can be a whole area afk but if I get 2 spectral currents could still mean I get over 10k if Im lucky. So I with 40-50 fishes caught get more points than the guy who caught 90 or more? There should be a way to make points without spectral currents. Maybe some kind of challenge log bonus during the duty idk.
14. yeah like I said in 7. It prevents whole grps leaving the duty when they got bad rng. It just being 8man would be enough.

I also don't like how you aren't allowed to change baits before it starts and it might become a problem if you accidentally sell an item to the merchant on the ship and want to buy it back but you only have 5s left. That item will be lost forever as the next ship has a new merchant with no sell history. I can't think of any other place where this is happening.

I think ocean fishing was a good attempt in general but it could be so much more if done properly. If dev team doesn't want to upgrade it, they should at least fix the rare fish catch rates and maybe remove !!! hooks and make spectral current triggering more obvious and consistent so it is less rng and more up to the fisher.