The definition quoted is pretty close to how I generally view cops as personalized relationships that people create to satisfy their own needs, wants, and abilities. However, those who identify with RA see themselves as a specific variant of polyamory that differs from the other styles. Being able to be more specific about what YOU mean by RA and how it differs from other forms of poly can be helpful in getting helpful answers.
I have read some more detailed descriptions of RA, but they don't all match so I don't know which version you are ordering. In general, however, I found it interesting that in the "What we do" section some were very different from my experience, but in the "Benefits" section they seemed to describe my life. I wondered if these writers did not get to the bottom line; perhaps they did not fully understand which parts of his philosophy were really related to the results they were seeking.
That is, you can say: "We do X, Y, and Z, and as a result, we get profit A". but it may turn out that benefit A actually comes from the fact that the person is smart, flexible, and creative, no matter what format he chooses, and does not specifically come from a recipe for X, Y, and Z.
RA is sometimes associated with "non-hierarchical" poly. I agree with another answer in the sense that I have my doubts about how well this works for most people in the long term, as we tend to form natural preferences. And yes, it seems that trying to keep all relationships on the same level is a particularly strict and difficult rule to follow, rather than being free from rules.
Finally, people sometimes think that the adoption of AR will lead them to stop categorizing everything, such as having sex with people from the category of "lovers" and not having sex with people from the category of "boyfriends". two should meet. I've never had a tendency to make rules that hard, but when RA helps someone avoid such rigidity, it gets more power. Unless they are satisfied with the breakup; personalized relationships, right? I know that some people look for very different qualities in friends and romantic partners, and who should I tell if that works better or worse?