Let's say first that I liked this game seems like a fun sex romp game that can be loads of fun.
Is this heavily frowned upon? If so I have no issues changing my future plans. I just thought sandbox would add a fun layer of depth to the game. I have no issues sticking to it's current format though.
I feel like a lot of people don't understand how to make a good sandbox game and the time it takes to make it right.
A lot of sandbox feel empty , clumsy and directionless.
Which makes for poor gaming experience and usually a huge waste of time (how I "rate" games is usually on a enjoyement/time scale and most sandbox are at the bottom by that metric).
Not saying it can't be done right just saying it rarely pans out that way and need to be thought all the way through , not an afterthought.
If you have a lot of time on your hands you could always make a small proof of concept and see the reaction/critics.
(Quoting myself here) Random thought on things that rub me the wrong way in sandbox game :
-Make sure the navigation isn't : confusing or cumbersome.
-Related to previous point do a click count for some daily activities and create a shortcut for it if it's too high.
-Populate every area and time slot with stuff to do or don't put them in your game IMO.
->If there is nothing to do in the evening but 1 scene don't open the time slot just make a trigger to this one scene until the time slot is properly used IMO.
And IMO the golden rule should be don't waste (too much of) your player's time.
(End of quote)
In the end I would say that if you do what excites you and are aware of the limitations and advantages of the tools you use to tell the stories you want to tell you should be golden IMO.