I don’t buy for a second that he will ditch the filibuster if the Dems have control. They could get rid of it right now and they would be no worse off than when the Republicans have the house, senate, and oval office and choose to ditch it to pass their project 2025 bullshit like they neutered it to stack the courts.
Ditching the filibuster, passing the legislation, and then blaming the house for not following through should dominate the election discussion.