Not illegal to conduct a completely partisan witch hunt (impeachment searching for a crime) even though some Founders warned that this would happen. Not illegal to inadvertantly snoop on calls with the President. Illegal to lie about the content of such calls but that will be hard to prove. In short, not illegal to destroy the Republic for partisan gains, but profoundly stupid.
Not illegal for the partisans on the House committee to conspire with the WB. Illegal for the WB to lie on the WB form where he was supposed to reveal that contact. But the WB is protected from prosecution in some cases. Not from committing perjury on the form but that will have to wait.
Not illegal to get a $50k / month job for your son by holding up the aid and threatening to hold up more aid unless the prosecutor is fired. That prosecutor was investigating the US / Europe / Ukraine Deep State that was funneling billions in Ukrainian wealth out of the country. Not illegal but shows profoundly bad judgement and goes against every American value.
We can't prosecute our way out of this, although there will be some and those will clearly help. We have to restore our foundational values through a lot of sweat and maybe a lot of blood if the sweat is not enough. There are no simplistic magic bullets for this problem. A lot of the American electorate is too apathetic to vote (even people who would vote the right way). A lot of the electorate is immigrants who have no idea what American values are. Some "Young people" too.
You touched on several great points in your post.
I believe the primary problems we face are spiritual in nature. Ephesians 6:12 is true.
However, if the Dept of Injustice and the Federal Bureau of Injustice do not do their jobs, and the rule of law fails in this situation to arrest, charge, convict, and punish the coup plotters - then our nations is done.
It's over.
So far, I have very little confidence that Barr will do his job.
And by that, I mean that Obama, Hillary, Soros, Kerry, Holder, Lynch, Brennan, Comey, Clapper, Rice, Podesta, Waters, Schiff, Pelosi, Strzok, Page, McCabe, and ALL of the coup plotters must face justice.
Our nation seems to be completely absent from the coming events prophesied in the Book of Revelation.
Perhaps our nation ends here. And soon. Perhaps