There is a difference between an impeachable offense and a crime. The House laid out a good case for impeachable offense, probably not for a crime. I think President Trump is guilty of crimes, but those can't be addressed while he is in office. Whether Pence, or a Dem elected in 2020, I think better for nation to pardon Trump of criminal offenses. My preference is something like the South African approach. Trump confesses any criminal offenses, with the guarantee they will be pardoned, if he restores any ill-gotten gains. Things he doesn't confess are subject to future prosecution.
I don't like Pence, but we would be better with President Pence for the next year. He has the normal super-enlarged ego of a politician who wants to be president, and is super-conservative on social issues, but I believe him to be sane, not a narcissist, and not a criminal. Whether or not the cult of Trump supports him is immaterial. We need a sane/non-senile president.
If I were Mitch McConnell, I would be arranging a deal for President Trump to be replaced by V.P. Pence, with a guarantee of pardon for any confessed offenses and the Ds signing off on that deal in advance. The pardon of Nixon was not a bad thing. It saved the nation a lot of turmoil, division, and anguish. As much as the later partial 'rehabilitation' of Nixon often grated on me, avoiding a criminal prosecution was the proper course.