Discussion with Carl Lostritto led to another potential 'why': quantifing parameters that are currently unquantifiable; two lists:

List of unquantifiable parameters (perception):
site
express(siveness)

-notions of expressiveness
likelihood
probability
expectation
anticipation
eagerness
suspense
transcendence
extraordinariness
reminiscence
resemblance
traceability (notions list from Kostas Terzidis: Expressive Form)

interaction
memory

List of current quantifiable parameters (architecture):
site space
workshop space
exhibition space
office space