This dumb bitch Sophia, lead her previous masters to their death, by having them summon slimes, all so she could cop a feel "squishy and floaty". I'm happy MC made the choice to summon Rabi(the Rabbit), and take advantage of her breeding skill to populate his dungeon. I would have done the same for the most part, but there are a lot of things I would have done differently. The dungeon itself could be expanded onto at a later part, but I would have added stronger monsters, to make it feel more like a dungeon. Adding onto the previous, I would have made my dungeon more like a trap dungeon, luring adventurers deep within, and having monsters block the entrance. The exhausted adventurers chance to escape would be lowered to zero, as well as adding monsters/items that can cause debuff effects/abnormal statuses(weaken, blind, confusion, poison, etc.) to weaken the adventurers more. I would focus on building up the dungeons ecosystem with other monsters and focus manly on rare species that are stronger than normal ones, then they themselves can breed their own numbers creating a somewhat self sustaining dungeon. There is more I want to list, but I'm getting lazy typing this out, so I'll stop here.