Then you have more people in the room! The idea is to present the ref and other officials with all the information possible. If the ref makes a subjective decision with that evidence, then fair enough. But you can't tell me that some decisions won't be impacted. It's not really that complicated. But your mind is set on this issue as previous posts show.
How would that work?
Person 1: I think penalty
Person 2: I disagree
Person 3: I'm erring towards penalty but I'd like to see it again
Person 4: I'm with Person 2, definitely not a penalty.
Person 5: Penalty for me, I think, but like Person 3 I'd like to see it again.
...how is that supposed to make things quicker?
My mind is set because there are really obvious pitfalls, flaws and problems that we can't just hope go away. It isn't a faith whereby it'll work better if we believe it can. Rather cynicism than pretending current and potential problems can be ignored.
This is the problem, we're talking about how to speed things up and your solution is to have a group of people bickering in a room. Let's get real for a second.