The Sims 2 and 3 Build Mode vs The Sims 4 Build Mode

TS2: Agree on the foundations, with a cheat can build very tall structures, water tool, proper Mansard roofs with room space and working windows, tape measure so you automatically know wall/room sizes, greater variety of floor and wall coverings, spiral stairs, can choose how many railings to place on connecting stairs, terrain tools easier to use - at least for me
TS4: ability to move/re-size rooms & buildings, for boring basements just down a floor below ground level and add box walls