I finished the full playthrough of the new update on Pirate King in one afternoon. So lengthwise it is still okay, considering the update introduces mechanics that slow the game down.
However I used a bug, how much that mattered for the time, who knows. The bug is AP related and works like this: You spend your AP normally until the cost of leveling the skill increases for the next upgrade. Quicksave (or save) and load that save, exiting the menu may be necessary, the cost for the update resets to the lowest value for the upgrade. My first upgrade is the stun-ability so it just improves the chance of successfully stunning. My second upgrade is auto-clicker, to which the bug does not apply since it is a one rank skill. Once past the first island, the skills are mainly QoL and one gets a bunch of new AP sources anyway.
The first island feels the slowest, since options are still limited and leveling feels slow. Level 5 seems necessary so that takes a while, especially with the new system as an encounter with a high level enemy pretty much ends the day.
Ship supplies are heavy, so do not overstock on those. Having enough for 1-2 days is sufficient. If you keep the weight low enough, most travels don't even use up your supplies. Even at 1 hp you can still farm them for free, since you are not kicked out of the hunt when losing. Weight became a problem when the endgame grind starts (like 100%ing the bestiary) and one has to dump all the items gained from it.
I do like the new mechanics overall, since it is far more immersive compared to the old version. Even if it makes some stuff more annoying. It still is a game and not a gallery for me and it wasn't too bothering so far.
What I would like for future updates:
Shortcuts to important menues. Especially the one to use up the engery on the girls, the status screen or going to the captain's cabin.
Autoclicker being the default or cheap to the point one can invest in it right away easily. It's mainly a concern to not damage my hardware.
Nothing of immediate importance, since I rather see more story content, but at one point later in the game development, I would like some mini-quests for the crew-members to serve as a stopgate for some advanced H-action. It's not much of a problem with Kuina and Nami, but when Reiju and Hibari join, I have a way more energy to burn per day which results in pretty much a speedrun from hello to blowjob in one session. It'll probably an even weirder feeling for future girls.
problems I had:
In the beginning I sometimes crashed upon saving. I did save a lot in the beginning, to reload upon meeting enemies beyond my level. Towards the end, when I saved way less, I didn't have that problem anymore.
Sometimes the game would create a screenshot upon entering a fight. very weird. After I got Autoclicker that problem stopped for a long time, but not entirely. Maybe it is caused by clicking mouse and or buttons a lot while the battle loads.