Me too! I enjoyed Sims Medieval but would love for it to be incorporated in Sims4. I've been playing Medieval Dynasty lately and wish that it could have castles. I am enjoying gathering sticks and stones, mining rocks, chopping trees, & building my village.
I wish we could have larger than 64x64 lots. I'd love to have a huge castle complete with docks and ships. Kelp and seaweed farms on the water. Fortifications on either side of the harbor to protect from storms & pirates. Mountains behind with waterfalls that are used to power windmills and canals running through to provide more water. I wish I could build what I'm envisioning.
Castles still exist in modern times so even modern castles would be cool.