Quote: Trainman "No, currently the VR has to find conclusive evidence to overturn the refs call. I think the VR should make the decision and only if unable to do so go with the onfield call.'"
But it is what happens now, if the VR had conclusive evidence he would overturn the on-field decision, if he was unable to do so, then it reverts to the on-field decision, either way you word it, it is the same process, the VR has to be sure otherwise go with the ref.
If you changed to say 'only' the VR could make the call then that would be something different, either the VR finds evidence to say if it was a try or not, or the refs call stands