According to the wiki, the senate majority leader can still require actual talking. If you ask me, they should do away with filibustering all together, or at least require that it be on topic. If you were at a local town hall style meeting and were trying to vote on something important, but a small group of people were adamantly against it, would you let them talk forever, or would there come a time where you would say that they've had their chance to sway opinion and it's time to vote? You don't want just a mob rule, yet, you also can't let a few people hold up things that need to get done.