In addition to regular castle blocks (walls, roofs, floors, stairs, etc.) I think there should be blocks to build pathways. There can be 3-5+ types of pathways and each themed toward a specific world. Here are some categories I made up:
Regular Pathway Block Plaza Pathway Block Crossroads (3 Way) Block Crossroads (4 Way) Block Left Turn Pathway Block Right Turn Pathway Block Circular Pathway Block (Has an empty center to place a tree, fountain or whatever you want in it)
I think this would be a great addition to housing and I hope you agree too. Thanks for reading!