I'll only comment on the Inglis try which was a shocking VR decision but, considering who the VR was, not surprising.

Maybe the rules need amending like they were when someone headed the ball over the line from a play the ball and scored many years ago. I think the rule was changed as it was seen as unfair to the defending team.

Did Slater gain an unfair advantage by knocking the ball forward over the defenders head. If the answer is yes, whether it was deliberate or not should be irrelevant.