Thanks again for the detailed feedback. I'm surprised you can even stand to play so much with all those frame drops. I would have probably nope'd out lol.
Disappointing to hear that the starting sewer areas aren't good. I split it up into three sections(Jane Bathing area, Bedroom area, Goblin area) since it used to be all one map. Although I did add more decorations like pipes on the walls, lights, 2 new characters, etc and 3d bed models. It seems like when there are too many characters on one map, it slows things down.
I suppose I could make every bedroom it's own little area but I wonder if all the loading screens would be annoying.
I also upped the default "render distance" option from around 20 to 26. I don't know if you messed with that setting but maybe lowering that could help.
The lower sewers/dungeon area, I already split in half once but I think I'm going to split it in half again since even I had some issues there when I spawned too many monsters in it, I had to remove some of them.