TL;DR: game is good but worse than PL1 in most regards, still got enough content and delivers but i have some issues with it. If you liked PL1 you will like second one almost certainly.
I really wanted to give it 3 but figured it's unfair compared to most other projects, so it gets 4 from me but only comparatively. But keep in mind it could easily be 3 stars too. So first what is good.
Writing is geniunely still great. Dialogues are well written, mostly funny and generally flow well. Zero issues with overall writing.
Adult scenes are quite pretty and improved from first one, even if there are MUCH less of them. It is now primarily a story (there are issues and i will get to it) with some adult content, but the content itself is good.
New characters are mostly good, non intrusive and fit well enough.
Here is where i start getting some issues however.
First of all, gameplay loop is much worse for several reasons. First of all 99% of events you can do "during the day", and very often it doesn't include morning, so at times you have this list of 5+ events that you can only do in one time slot rendering morning, evening and night almost completely worthless and you have skip days to just do this next event in one time slot, just poorly thought out and bad design. Second, most items are worthless, absolute most of flowers are never used, coconuts, bananas, fish and bamboo are used i believe only once or twice, i suppose to justify reusing map from PL1 entirely, a lot of areas are never used once too, leaving this weird empty and unfinished feeling. And there is one time you need 3 daisies for some unholy reason and they only grow once every 3 days i believe and unless you know this ahead this quest just need to sit for like 10 days there. Entire money and shopping mechanic is completely pointless, i'd like to say it gatekeeps you from getting some content and quests too early but it kinda don't, so i fail to see the point.
And while writing is geniunely good, main narrative and some decisions are just not. In fact, there is no main narrative, the biggest "arc" you can call is the whole Scarlet feature and the conflict. New girls have some extremely spotty progression, Emi and Scarlet have overall good arcs even if Scarlet wasn't developed much, Ryoko and Luana were just... mostly there, especially Luana. Oh yeah and Mina, i completely forgot she was there. She just mostly adds to body count.
Speaking of girls, a lot of old favorites just got shafted for no real reason? Did Olga even have a single scene? I geniunely don't remember. Karen, Mi Sun and Reyna are completely absent from the island, and while some have a bit of narrative progression (Jenn in particular had good arc with restaurant, Grace had a tiny bit with a blog) the narrative is just kinda... flatlined. In fact it's kind of the biggest issue of the sequel, that besides Scarlet arc nothing is really happening. For most girls their stories are kinda done and they got nothing to do besides sit there and be pretty, and the story is as well "all is pretty good on the resort" and instead of a cool island adventure we got a simple comedy slice of life. Relashionships of Jack and the girls also don't move anywhere and don't take the next reasonable step.
Overall good game, but a dissapointing sequel. PL3 is already in the works, i hope it can do better narratively and finish the trilogy and won't be milking it forever and making it worse.