Each debater could be given 45 minutes of talk time, to be used at his or her discretion. If someone interrupted while his opponent was speaking, the speaker could hit the button and put the interrupter 'on the clock', so rudeness would not decrease a polite debater's time.
When a debater's time expired he would be required to leave the floor, and his opponent would continue to make his case until his time expired.
No more egotistical journalists injecting themselves into the proceedings. The best ideas are usually the simplest.