As someone who was binge reading it last month, 3 weeks before the final chapter, it was much fun. I do agree I would've liked 2 or 3 more chapters with the full harem but I think that's better than dragging it out and overstaying its welcome.
Also just want to point out that I often read how authors don't have the balls to end it on the harem route, so here you have it. I think it's one of the stronger romcoms/harems out there.