At the current state of the game you do not need to increase the points with Allison I think that it takes 4-5 to activate some scenes. With Camelia up to version 0.0.5 the points are useless.
It's true that I could never understand the meaning of "sabatage a chair" unless someone speaks about it, here on this forum. I think a game Hint that gives a clue would be a good solution. A button that will give messages to the player like Kate refuse to get massage from you. Can you make it happen at night?
One way to do this is to imagine if you are not the creator of the game. So basically question yourself what the achievement title means to someone who doesn't know what it's about. "Buy a scuba suit" is very straight forward that you need to make money and then buy a scuba suit, and that's fine. But "Marine gifts" doesn't really give any information whatsoever because you don't know who/what/where/when/how to do this at all.
Good thing you mentioned stats too because stats definitely need clarity. To me, when it comes to stats, I'd just straight up say it on the game "Need minimum X stat" so people would know how far they need to grind rather than increase 1 point, then try, fail, repeat until success.
And yet all of these things happen anyways. It's not entirely your fault, for one there is the language barrier, then as you say sometimes it's hard to see the forest through the trees. Perhaps if you took the assumption that everything needs some amount of hints then most of your players would be happier, I for one would rather be shown "obvious" clues for some of the "easier" tasks than struggle with the harder ones. It makes it hard to enjoy the story when you're frustrated over tasks and progress. The other MAJOR turnoff for a lot of players is having to do the same thing over and over to move forward. I understand the desire to add playtime to the game so it's not too short, but the is a line that can be crossed where fun turns into a chore. You must do a better job of rewarding players. The average player is not going to stay content just getting to watch two women fool around in front of him especially after they made fun of him. It's a very small segment that enjoys being emasculated and beat up.
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Now that I think about it some more, is it too late to remove stats altogether? I just can't think any benefit of having stats because stat-check simply prevents progress, and the only one solution is to grind the required stat. However, the way the game is designed, you can only increase stat by 1 in a day (except fitness that you can increase by 2/day), and in some cases exclusive to one another too (e.g.: if you increase massage, then you can't increase photography in the same day). So what happens is a lot of repetitive grind where nothing happened because you're blocked on your progress. I don't think that's a good design at all.
I think after, when i talking about the massage with Maisie (when she sunbathing, probably must massage education 10), and the Captain, and Kaori. After this, you can sabotage the Captai chair, night or late night.
I'm the first to say that increasing the statistics is not fun, so it's never necessary to increase them too much. For example, to get a blowjob from Marija (the cleaning lady) just need a point, to kiss the Maisie on the edge of the ship is enough 5, to make bondage with Liana need three lessons of bondage and to increase the money I added the possibility to sell the shells taken from the sea. The only case in which you need to waste a little more time, but let's talk about a few minutes of play, is to increase fitness to fight with Camelia and sit on the ship's edge with Maisie. It 's true that are many things but the game also has a lot of content, so I think everything is very balanced.
I think you're underestimating the time required to grind stats. There 6 subjects that you can study on PC. Even if you only need 5 points each, that's already 5x6 = 30 days of grinding stats. If you need 10 points, that's 60 days of grinding stats. That's on top of other stats that you need to grind too.
This is where the concept of "balance" needs to be questioned. Content is good because that's what we play the game for. Stat-requirement is not good because its sole purpose is to prevent the player from unlocking content, and stat-grind is done solely by repetitive clicking the same thing (not actual content in comparison to traditional games where "leveling up" actually involve gameplay content). So when you said that it's "very balanced" because there are a lot of stats but also a lot of content, it doesn't necessarily mean it's a good thing.
