there should be an option/skin to have the original roof color, or a variation thereof
e.g. technicians "colorful" roof color look a LOT like the artisans' default roof color; this really limits the usability of the dlc since being able to recognize the house type from a zoomed out aerial view is obviously desirable
the nightlife skins in particular don't look much different during the day anyhow so might as well keep the roof...
and i'm sure most other skins can also be reworked to still have the house type be recognizable at a glance, e.g.:
new engineer brick (left), new engineer colorful (middle)