I like the idea of your carnival world @Dannydanbo and it sounds a logical way of doing it too.
For me personally I would seriously love larger lots like a few 100x100 lots especially as we don't have CAW for Sims 4 or the ability to plonk lots down exactly where we would like them like we could in Sims 3. I'm currently trying to build a more accurate version of the Palace of Versailles as a TS4 content creator is working on some seriously beautiful content for the Hall of Mirrors and its impossible to do a build like Versailles justice on a 64x64 lot without having to seriously alter/compromise it and the same for a lot of other historical palace builds. I think a few other TS4 builders would love a few larger lots too to really let loose, but that's my personal opinion and wish though. Regardless we definitely need more 64x64 lots! I do use a lot of the smaller lots to build on as well, but I would love a few larger 100x100 lots as well. However, I definitely agree with @AlbaWaterhouse about the need to have multi-use lots. It really does seem silly that you can only have one lot type per lot especially if they are going to keep giving us smaller worlds with smaller/fewer lots to build on! I've edited a larger Windenburg lot to cater for a couple of flats for two sim households, with a restaurant/nightclub, a spa/gym and two shops for a nice little neighbourhood feel, but it can't function that way which is really disappointing.
