The decision not to add bonus makes sense. I was about to settle for 6th, went back to play again (for like the third time) and got third after learning a strat lol.
Agreed, past that I try to use the array of apartment complexes as opposed to the twin towers in the distance (more consistent and uniform shape allows for easier construction). Towers are good for finishing and creating a new "base" in case the stack is getting cluttered, at least in my experience