Context: To restrict the meaning of (architectural) formalism to art for art's sake is not only reactionary; it can also be a purposeless quest for perfection or originality which degrades form into a mere instrumentality".

Question: What is a reactionary thing to limit formalism's meaning to?
Answer: art for art's sake

Question: What sort of quest lacks purpose?
Answer: quest for perfection or originality

Question: What ends up being reduced in quality by this quest?
Answer: form

Question: What is a reactionary thing to expand formalism's meaning to?
Answer: Unanswerable

Question:  What sort of quest defines purpose?
Answer: Unanswerable

Question:  What ends up being maximized in quality by this quest?
Answer: Unanswerable