Does anyone know what the other side of the issue is? The fact that this article paints a totally rosy picture, does not mention downsides to the system, only quotes government side sources (they couldn't even find a metal dectectorist to say "yeah it's not perfect but it's good enough"?) is setting off red flags for me.
https://www.theguardian.com/uk-news/2019/nov/21/detectorists...
The biggest problem, that I'm aware of, is in giving a representative commercial value to found treasure trove, many museums struggle to afford. There have been many calls for museums and trusts to get more formal government assistance to pick up major finds, though they can get lottery assistance I think. Here's a piece from nearly 20 years ago, when I think the new rules were still quite recent: