Maybe you really didn't see such suggestions on itch.io, I am not usually looking at the forums here so I will take your word. But I am a member of discord group and there were a lot suggestions on balance and other non-lewd elements. Some were implemented, some not.
About paying for the game you loved - That's the risk with games in development. You can't force developer to add elements of what you like. Until it's finished there would be changes. I am not sure that if you get the old version of game that you loved without new content it would be enough for you.
I remember positive changes in balance for player. For example the recent change is a change in stats for Mutated Hydrangeas. It was discussed with the developer that for some builds it's much harder to complete quest Sick Workers. He decreased the amount of MP for them and also changed their pattern of attacks. Now they are not spamming almost constantly Mind Pollution.
The game is balanced around experienced gamers and developer - I am not sure. It requires to learn it's mechanics and tricks - yes. But I think it's good. I remember how in my first playthrough I didn't get to Festival even after day 50. And now I am creating strategies to get there with the least RNG on day 19. It's an improvement for me.
And I disagree about having one solution for the boss. Could you give me an example of such boss?