NFL flibuster

So maybe the NFL has an idea to enhance the functioning of the U.S. Senate. Maybe the filibuster rule is not all bad, even though it is profoundly undemocratic and institutionalizes the tyranny of the minority. Maybe it just needs to be tempered. Like, for example, the coach's challenge in the NFL. A coach gets a finite number of challenges. You simply cannot challenge every single decision by the officials. If there were no limits, games would go on forever and nothing would ever be decided - with the possible exception of blowout games where everyone finally just wants to get the game over with and go home. So what if the Senate were allotted just 5 filibusters in each session. Use them too soon and too frivolously and you wouldn't have one for a really important issue. A senator or a party would need to really weigh how important a bill, or a nomination really is. They couldn't make a simple calculation to oppose everything, to block everything in the hope that failure of the majority will lead to the defeat of the majority. The filibuster, if it has any legitimacy at all, should be reserved for issues of serious, grave matters of fundamental principles and national interest. It should not be merely a cheap and easy political tactic. It is, after all, a matter of the integrity of the "game."