I don't deal in fictions, too many variables that change at will, when resolving an issue, the goal posts are then moved. I would address the one fiction I see however: your use of 'pharisee' and 'weeds' to describe the opponents in this 'fiction'. I know the context and the origin of the words, but what is humorous is that you, despite engaging in the same types of behavior are not lumped in with that group as well. You say you aren't a pharisee or a weed because you aren't. Yet your behavior, posting content and lack of openness, does little to indicate that. I am left with the old: "Am I gonna believe you, or my lying eyes.?"
How much is compromise with weeds the current reality of the LCMS? Is it a problem?
I reject your premise, however if you are asking whether one should compromise with other Christian sinners, yes, to the extent that Truth isn't discarded, God's Word isn't compromised, the Sacraments are made available administered in a proper fashion.
The reason it is fictional is because I have not decided yet what kind of book to write or if I will. Do you believe every church has weeds and wheat? Are the Dana Carvey moral policeman church ladies I am talking about the wheat and my part of the schism, along with P#4, the weeds? Remember a tree is known by its fruits. I am talking here about observed fictional factual behavior.