Think the house search comes under the fruit from a poison tree problem. If they got information from the intelligence agencies that was tainted from the made up story from Hillary and the DNC, then the search of his house would not have occurred without the tainted intelligence information. It may all be thrown out. Then the collusion case dries up.
Something to consider here is that if Mueller is really acting as a Democrat operative, then bringing an indictment like this is one of the worst things he could have done. The whole story of illegally obtained FISA warrants and the covert surveillance of senior people in the Trump campaign could be exposed in a criminal trial.