I said (somewhere) it back when Republicans were in the minority in the House, and even though the filibuster technique has been helpful to causes that I’ve supported in recent years, I’ll say it again: this sounds reasonable to me:

… Senator Jeff Merkley, an Oregon Democrat … proposes that lawmakers be on the floor debating throughout the time they are relying on filibusters to derail measures. “You shouldn’t filibuster casually” by being able, as currently allowed, to invoke the tactic “and go to dinner or go on vacation,” he said. …
[Democrats] also want to abolish the system of secretive “holds” senators can use to delay presidential nominations without identifying themselves and their reasoning.

There’s no reason that politicians can’t organize relay speechification when the legislation justifies that degree of opposition, and there’s no reason that they can’t identify themselves when they want legislation held.
With the reach and authority of the federal government continually expanding, a strong case could be made that more types of legislation should require supermajority votes, but that’s an argument that has to made, not assumed.