Basically I see two, maybe three viewpoints within the Church:
1. Western Liturgics is totally out to lunch and must be discarded. It left the true path and was not inspired by the Holy Spirit like the Eastern Liturgy.
2. We ought not to have WR parishes; we ought to be of common faith and worship. But we should make an effort to salvage anything we can from Western Liturgics for Orthodox use, since we here are Westerners. One of those salvageable things would be modal chant.
3. Let the Westerners do their thing and lets not mix it up with the Eastern traditions at all. Western rites are perfectly fine and good, and ought to be encouraged.
So why not have every US parish be WR, since we are certainly westerners here?
I understand the logic of not wanting to mix traditions but keep things separate, distinct, and pure. I have a hard time understanding the wish to section off the Church into distinct liturgical traditions. I see great concern for the purity of Eastern rites, but anything Western is either dead, Catholic, or reconstituted. How much of the Orthodox Church really approves of Western rites at all? I haven't gotten the impression that it's a very large portion; everyone I've seen disapproves of it, saying it has gone too far afield. From that point of view it only makes sense, then, in Western countries, to follow the pattern of integrating into the existing culture and appropriating things that can be salvaged, like the chants.
To me the problem of Western vs. Eastern liturgics feels a bit like the problem of the "tossed salad" analogy in reference to multiculturalism, where we must be very careful to separate out and be distinct, and never mix, since that would destroy the purity of individual traditions/cultures. But traditions/cultures change over time and evolve as peoples interact. And I just can't see splitting the Church up like having separate rites will do. Yes, way back there were different rites in different places, but to my knowledge this was due to peoples being cut off from one another by wars and unfortunate circumstances.