You know, Im looking forward to/hoping for when a recruit shows just why the Guardians went with green rings. The Guardians probably spent a long time deciding on which color to use, and being intelligent they had someone knowledgeable about the lights to judge the relative risks accurately. I want to see the mania of the recruits, the reason why they have spent millennia using green rings when they could have put the effort into making the otherwise superior rings work. I want to see the SI recruit someone, and despite the self awareness training, go completely crazy and cause some lasting damage. Not kill everyone or something, but very clearly make the wrong decision because they were overwhelmed with short term desire. Because right now it seems like the SI is handing out rings almost like candy, and each person adjusts just fine to it. Along with the story element, it just makes the Guardians look really dumb, because the green rings are so limited in so many ways, and they could have put in the effort to designing a system for choosing which people could use orange rings well.
Dox actually did just that. It may have been inferior to the SI's ability to directly look at someone's desires, but it's clearly possible to design a good algorithm for deciding which people can use orange rings well. And if Dox can make that algorithm in a week or however long it took him, the Guardians could have figured it out at some point.