No, thats simply untrue.
Why? This case shows the current system works, ref unsighted, refers to TMO, no clear and obvious grounding so no try. In this specific case they had quite a few angles and in none of them did it appear the ball was grounded over the line so I dont think this one was even one where there was any reason for controversy.
No reason for controversy? The fact is we will never know if it was grounded or not. There is every chance he DID get the ball on the line we just couldn't see it. Seriously, all you need to do is ground the ball with any part of your body on one hair-line part of the line and technically it is a try.
There is no conclusive evidence that is wasn't 100% not a try. There was no conclusive footage of him being held up, and no conclusive footage of him losing the ball. The footage was INCONCLUSIVE!
So just because no-one saw it doesn't mean it wasn't a try. The fact is, it is an unknown.
So why should unknowns be awarded no try rather then try? My point is, attacking teams should get the advantage in unknowns. This would lead to a dominate maul being awarded with a try even though bodies are flying everywhere and you can't see the ball grounded.