I’m asking if you suggest housing estates of larger sizes can use =quarter etc, isn’t it that they can’t be indicated as housing estates first, which is using place=estate . So we shouldn’t try to use place= for something that can exist in different corresponding place= scale. They have highly varying quantitative and qualitative aspects that aren’t “roughly scaled by size and characteristics” .
Orthogonality is not the same as whether is a hierarchy. It’s means whether something can be considered as both things somehow. You said =neighbourhood “might fit” in theory. Doesn’t that mean they are comparable enough? But the complex is a housing estate, the surrounding isn’t.
Your idea about =complex applying to WTC shows neither what use it is, nor what scale and importance it is. A office park or business park can be very large, an industrial park larger yet. One such “complex” feature that already exists is shop=mall . It doesn’t use place= .