Good discussion here by Dr. Martin Noland here about the fate of the "Moderate" Lutherans:
Luthercore and LCMC want to create a "moderate" Lutheran denomination. By "moderate" we mean that they want to buy into enough of the modernist metanarrative so that upper-middle class whites from either coast wouldn't laugh at them at dinner parties, while at the same time being able to say the Creed with a straight face.
It's not going to work and I'll tell you why.
Moderate Church-bodies are like religiously mixed marriages. Eventually one person is going to convert to the other person's religion- probably the woman's (this is my wife's theory). The problem is that their theology is too unstable. I know this having previously been one. So, if your one sort of a conservative leaning moderates, you'll probably eventually feel you're being inconsistent or have a underling sense of it in the first place, and you'll want to join a Church-body that is more consistently confessional (or at least gives lip-service to it). You'll also eventually get annoyed with having to endure social justice sermon sunday after sunday. I know a number of people who I went to seminary with who are trying t get into the LCMS or convince their congregations to join. I told one female pastor that I went to seminary with that I joined the LCMS. She said that she wished that she could also join, but didn't want to lose her job. These people were always generally pretty conservative. It's just a matter of consistency. Or, on the other hand, you'll eventually buy the far-left arguments and start being consistent in that way. If you don't believe in an inerrant Bible, then why believe the strictures against homosexuality are valid but not the ones about the different roles assigned to men and women? Moderate friends of mine who were against homosexuality in the late 90s are now for it. If you don't start being consistently liberal about these things then probably your children will. It's only too easy in this culture after all. That's why LCMC or Luthercore will never work.
Either their members will drift towards LCMS (or maybe a mega church or something) or their children will allow for gay marriage and ordination, and wear rainbow vestments and have signs saying "Everyone Welcome" [i.e. everyone but orthodox Christians] outside their churches, which they'll put up before going to the pro-abortion, pro-gay, anti-[insert current war started by a Republican administration] parade on earth day and/or national evolution awareness day.
It's just too unstable a theological mix.