Since you don't mind more feedback...
Let's say in a future update you give us the option of Beryl going out on a date with Zak or them just staying as friends. I would keep them as just friends. I like the harem scenario going on and don't want to break it
But it might be worth making a poll or something for this in the future to see what others think (there wouldn't be any point in making alternate romantic partners for the girls if no one would pick that choice)
And a personal suggestion, the one thing I disliked about Tutor 1 was that you couldn't make both Rubi and Wanda happy (if you accept incest Wanda is unhappy, if you don't accept it Rubi is unhappy). In the future, I'd like for this to be settled (maybe have a series of choices that end up with either Rubi giving up or Wanda giving in, or something like that. It's just something that left a bitter taste in my mouth since the first game)
As a side note, if you don't mind me asking, what are your plans for the future? I'm not talking about anything plot-related, but rather in general. Like, is there a chance for a Tutor 3 once 2 is done, or maybe are you planning to start something else after, or maybe no plans at all? And, if there is another game, would it be in the same style as the ones before, or maybe change to a more sandbox-y style we usually see in these renpy games? Again, you don't have to answer if you don't want to