There was really no rushing. The House Committee was done. Everything else was being stonewalled by the President, and it would have taken literally years to get that through the courts. If she had waited for all the evidence it would be LONG past the election before they could put forth the articles. Truthfully The Administration (if it won the next election) would probably be able to streach out the court cases past the 2024 election.
She did foresee this outcome. She knew that no matter what evidence they had the Senate was not going to remove him. The evidence they had was extremely damning and the Senate simply ignored it, wait another 4 months to get more and they would just claim that we are too close to an election and call for a snap vote.
This was about making talking points for the upcoming election, not removing the criminal in chief.