This is a good topic, and I say Yes, bring the elders into the light, expose them, and let them answer for themselves, and let Watchtower answer for itself, if they can.
For either a girl or a young woman to be questioned by 3 older men about a sexual assault has to be a traumatic experience for her. To be asked graphic questions about the lurid details embarrasses and humiliates the victim further, and adds more damage to the rape.
As to the "how far apart were your legs" question, I think the elders ask questions like that to try to determine if the girl/woman was really raped. These elders are looking for an angle to say the girl was complicit in what happened, to reach the conclusion that 'You must have asked for it.' They were looking for a way to blame the victim.
The BBC report was outstanding, and that is exactly the kind of exposure Jehovah's Witnesses should have.