So these are my suggestions:
-Roads: The game is called "Retro-Pixel Castles", and there are no roads in a castle, but imagine them villagers walking on the road, going to their houses; I think it would be nice.
-Planning tool: Everything made while this mode is activated is planned. For example: activate this mode, and then put houses and other constructions as well as roads (), it will tell you how many resources will you need for constructing all things planned, and also a button called "Build". When you press it, the villagers will start building the construction you selected.