Hello! Thank you for downloading the game.
What do you mean by sandbox? Honestly I haven't played many games so I don't know what you mean.
As for your concern don't worry! None of the topics you mention will be included. As for lesbianism it will be well developed, based on routes and will always include X as a third wheel. You choose whether you want to follow these routes or not.
Which girls would you like to see in future versions?