Hey Konoi! Glad you are enjoying your Apprenticeship so far!
Skipping minigames is not a bad idea, thanks for the suggestion!
Morale meter gives you indication of Good/ Evil progress you are making with each character. It can affect Relationship potential and their role in the battle at end of the game. Relationship meter gives you indication on your overall progress getting to know that character.
We are trying to keep the game more ecchi than eroge. Don't get us wrong, we like eroges, but we feel there are enough of them out already. However, there will be slightly more explicit scene for each character if you max Relationship and make a character your girlfriend.
I think max relationship potential for chapter one is 2.5 - 3? You have to Talk to them everyday. Night time opens up at start chapter 2 so you have more opportunities to build Relationship paths later in game.
Thanks for playing Faulty Apprentice and giving such detailed feedback! If you have any more questions let me know (=