I did write a post a few months ago about the placeholder walls that were applied to every Eastern civ in the game and how the devs could make them look appropriate to each and every one of those civs, here: "Eastern" civs' walls should be redesigned, for specificity and uniqueness!
I wish it had gotten more attention and that the devs would take a notice of it.
Would be nice if you and other people here helped it go up on the forums again, it might get into Relic’s radar.