Man, I'm never leaving unfinnished work.
I agree with the post you responded too. In that I think because the MC is a ghost and you play as several different characters is a big reason it is not as popular. If someone for example wants to play as a teen girl going to school, you have that but only for a bit. If they want to play as a male teacher using their position, you have it but only a bit. So you have a little something for everyone but not a lot if that makes sense.
I agree you should finish it, as not finishing this game would be a red flag for any future games and leave people wondering if you will just rush or not finish it and be less inclined to finish the next one.
With all that said with the quality of your work, I think your next game, assuming you focus on a single MC will be more successful, just IMHO.
Me I would love to see you do something along the lines of Glamor but obviously a lot less grindy than that game, That is a game I so want to love but just can't play. Your game has a much better flow to it. Anyways, good luck.