The Mueller report indicates that the investigation is over. It does not mean prosecution is over. It does not mean the President hasn’t done anything unworthy of impeachment. There are full pages of documents related to this Russia matter that have been blacked out completely. All of that stuff can now be shown to the public because the ongoing investigations are over.
No more closed door sessions of congressional testimony, no more reason to refuse answering questions. If unredacted documents show Trump was involved directly with more crimes than we have a case to make to congress for impeachment.
Also it’s very likely this report was given to Trump a few days ago or at the very least a summary of it which is why he went nuts on Twitter and then suddenly claimed he was fine with releasing it to the public. I also had the feeling the report was imminent when Rachel Maddow took the night off on a Thursday. It seemed odd.
My guess is there is something VERY bad about Trump and Russia in that report that he freaked out over and then came up with a way to spin it to his base which is why he’s cool with releasing it now.
Bottom line is we have to wait and see, but we should be able to see a lot more now that the ongoing investigations are over.