A mall that’s only random clothes, shoes, and jewellery stores surrounded by an ocean of parking lot is very unattractive.
As you say, a mall with actually useful stores, like grocery, pharmacy, perhaps a restaurant or two (not chain fast food), etc, with residential units on top or very close to constitutes more of a community than a mall and is very likely to be sustainable versus the former.
It starts early in the design process. But at that stage, it would be best to pause installation, have a mechanical engineer do the mechanical design (including equipment selection) based on an energy model and install the recommended equipment.
I work in building science. It’s obscene how little actual design and quality control goes into residential homes.
The typical design is just one step above being illegal, and people are often scared off of doing anything more than that by the threat of increased cost. However, they don’t realize that they pay for it either way; either on their mortgage, or on utilities. Only one of those you can actually own in the end.
Right hand rule applied to torque.