Interesting you say that conservatives should not quit the fight but should, instead, fight for control of the denomination. Interesting that you cite Laodicea.
In none of the 7 churches is there an instruction to quit. Rather, there is an instruction to overcome. I like your thinking.
The legal question in 21st Century America is how to contest legal ownership with an heretic group which has thoroughly infiltrated the hierarchy and passes itself off as the denominational heirs of traditions and properties. We people look at the denomination's confession of faith or articles of religion, at the denomination's history and traditions, and even at the denomination's founders, and we are certain that we are the true heirs of that denomination.
How does one convince a court of law of that truth?
If we could answer that question, we could cast out the heretics.
I think your hope lies with the youth. If you can get a serious outreach to the youth (high school and college) and get them on fire for the Lord and bringing in new Christians, then you stand a decent chance of taking back the denominations. The fact that some denominations are being taken over by apostates is a clear indication that there is not enough new growth at the grass roots.
In my experience young Christians are full of zeal and are for the most part even less tolerant of blatant sin than your average 40 year old. Young Christians are less likely to put up with apostacy than old died in the wool demoninationalists who, like sheepish democrats, are Methodists and Episcopalians for no other reason than that their parents were Methodists and Episcopalians.
You need to fill the pews with former atheists and former cultists and repentant sinners. Then and only then will these denominations have the votes necessary to throw out the apostates and take back the church for Christ.
So, my solution is outreach. Get out of the building and hit the streets. "Compel them to come in."
That's because it was the only game in town -- its not like there was a choice of denominations, or anything.
Now, if the Presbyterians go apostate, the Baptists are down the road. If the Methodists go apostate, there's a servicable Wesleyan church not far away.
It's a different world now than then.