So basically the NRL has conceded that video refs are getting too many decision wrong, and their solution to this issue is to...... Just limit the amount of decisions they can make?
The issue isn't about the correctness of the video referee here, it's the idea that the video ref is being way overused, sucking the joy out try scoring. So no, the NRL aren't conceding the above at all.
Secondarily, the harder you strive for perfection ($20 million bunker, slowing every play down to milliseconds) the more glaring every mistake looks - even if the overall number of mistakes has decreased.
I don't think the execution is perfect (i'd prefer coaches challenge, for example) but I'm behind the concept here 100%. I'd also suggest using the video officials in a similar capacity to the touch judge for general play -advise the ref if he sees something, but ref makes the call, and no overturns once the ref has made a call. The Broncos Titans overturns (and then not) were farcically inconsistent.
The "always use the technology available" argument is a slippery one. Under this logic we could slow the game down more and more, way more than now, introduce potential overturns on every play, have 26 refs on the field, one for every player, and still they would make mistakes. Maybe it would be 1 in 1000 wrong, but they'd still be there. And they'd be howlers.
But would 99.99% decision correctness make Rugby League better, at that cost? f**k no.
The gradually increasing usage of the video ref in the last 20 years has not made Rugby League a better game.