Remove Key Spawners from Region Limit
Due to the (very much needed) restriction on enemy spawners building fun dungeons can be pretty difficult but still be achieved. Having key spawners contribute to this limit of two per region, however, makes it even more difficult, requiring massive structures to be built to house all of the regions. Even if they are just edges or corners of them.
I think an easy way to fix this would be to remove key spawner blocks from the limit. I do know that the limit can be avoided using mystery boxes, which some people prefer, but I'd like to use the platinum I purchased for my dungeon rather than having to farm for hours to buy mystery boxes and hoping that a key spawner that I haven't already placed will come out.