The filibuster gives the minority power to block everything while voterramas allow the minority to raise any interest they want and have their approach to that issue get a vote before the legislation can get passed. Doing this means that all legislation will be more what all legislators support, but no party gets to hold up all the others’ priorities completely.
This is exactly what the Senate is supposed to be about, giving each party’s representatives the right and ability to be heard. But not the ability to veto what the majority wants to do, and thereby stand in the way of what the voters were trying to get done in voting the way they did.
It’s important to remember that the founders actually indicated they wanted to limit the power of political parties. Not give one political party the ability to hold another party’s agenda hostage.
Ross's Writings 