"If I want to do propers at a non-RC parish"
I would never advise doing what the Romans do in any non-Roman church. That's ground for dismissal and total disregard for the liturgical traditions of the denomination that is paying you.
I think what people are looking for in a FAQ is not so much "what are CMAA's criticisms of today's Catholic music" but "how does one provide Catholic music (from scratch)?" So if you wouldn't mind, here is what I would suggest as a talking point:
You're saying that people are talking about Propers outside of CMAA?
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