Karn, I'm pretty sure I detailed a framework that addresses many of your issues, please take some time to re-read what I wrote:
Here's my caveat: Deliberations are where the committee needs to step in and protect the teams. Judges should be very tightly controlled on changing placings and have legitimate arguments for doing so. Any arguments should either be in line with the rubric, or be factors that the rubric did not account for. We can't have judges using rubric for points and then using their own preference for placing.
So who's facilitating? Committee is allowing judges to do so. They have the right to either let points stand or allow judges to deliberate.
What are they discussing? Who is better based on the spirit of the rubric. Who left a lasting impression that night.
Equal time after performance? This is a faulty assumption that all errors for each team lead to offsetting scores. A team that has more gimmicks or 'impact' elements will actually benefit more from a quick score than a team that provided a meticulous and complicated routine.
Your issues seem to be about judges in general. Yes, they can have personal interest or bias, but that's not something that goes away by staying with points alone.
Think of it this way:
We all view bhangra performances differently. There's a balance between the different elements of josh, nakhra, choreo, execution, difficulty, formations, etc. We all have our own personal balance that informs how well we receive a performance. A rubric is supposed to be a quantitative representation of that balance. But it's only ONE balance, the competition's preferred balance. It's guaranteed to be different from what every single person in the audience is feeling. So it's impossible imo to make a rubric that will satisfy even a majority of people watching. How many times have teams heard, 'oh we liked you, but rubric said this.' That's such nonsense, the rubric is supposed to match our general notions. they're not commandments handed down that we must worship. They have limitations, we know the limitations, so the deliberation is a complement to produce better results. Scores group teams so we can discuss just the ones that match the rubric well, then judges deliberate so they can use their years of experience to include non-rubric elements.
If I had my way, we'd have 9 judges and just do an instant runoff system. Judges score teams like normal on the rubric, the scores are added up and given to judges so they have reference. They submit a ranking of all the teams. Then you just do instant run off, dropping the team with the lowest vote every time until you get to the winner. But competitions are conservative and teams are paranoid and judges are not involved in the process (they just show up and judge) so we're stuck with what we have.
The Alternative Vote Explained
Sorry this was kind of all over the place, but to your point Karn. I disagree strongly. Talk to more people who have judged, as you said you don't have much experience with it. Every judge wants deliberation because they know the system is faulty and they would rather adjust and put out placings they really believe in (they can also not change anything and stick with their scores, but at least it's their choice then).