If it's only opinions and recommendations, then yes that may be fine. I'm sure I have a different perspective than you do (as we all have our own) and so my question is "how does someone look at disparate opinions and find a coherent viewpoint".
I checked out soundbetter.com and yes it is very subjective as to how people present themselves and how they can "market" themselves to you. I find that the person's name/handle has a certain bias, their photo/headshot has a certain bias, their "bio" had a certain bias, and their "demo" tracks have a certain bias. (at least from my own perspective) I found that the least qualified actually sounded pretty good, and the most qualified left me doubting (in some cases). It's all over the place. I'm just suggesting that any 'system' be somewhat well-thought-out rather than off-hand and only opinion based.
I'm probably going out on a limb here, but based on the forum users you mentioned I have these particular viewpoints (which are my own and perhaps quite different than yours) and are just to illustrate how anyone might see such things in a certain light:
@brianinogang is obviously quite talented, and could be a go-to for certain projects. My experience is that he has worked with many diverse acts and sometimes struggles with how to present that act in an appropriate way based on style. That said, my understanding is that he is based in the Philippines and is working with Tagalog vocalists (and perhaps others) that are pretty eclectic to many Westerners. Very strong on Metal genres. Just something to consider.
@AJ113 is by definition mixing NWOBHM material and his own band Salem, as well as more diverse acts as time goes on. He has established himself as an authority in his own right on how studio procedures should be handled, and I respect him for that. Not everyone agrees with his methods, but that's okay. I agree with him most of the time, and would give him a high recommendation in areas he has shown himself to be proficient in.
@Paul999 is a high ranker for his knowledge and participation in RR over the years. He was a moderator there and also here at IRD. I consider his opinions top notch and worthy of consideration on all levels. He is a businessman and has built an admirable studio space in several incarnations. He is quite knowledgeable, but is also humble in always seeking a better way to do things. While I was blown away with his "bass guitar" demo track (some years ago on RR), I don't recall any BTR mixing experiences to rate his talent on in that area.
@Danny_Danzi has achieved mythic status at RR and also here at IRD. Obviously, Danny has carved his own niche and expertise, per his memorable long forum posts which almost defy comprehension and retain-ability. I was blown away by Danny's production of his own material some years ago, but despite his descriptions of his methods and values of mixing and mastering I dont' think we have heard examples of such in order to "rate" those talents. Just saying. I would probably recommend him for anything just based on his own confidence, knowing that he would tell someone "this is not a good fit" if he couldn't help them. That aspect in itself is huge: what are your principles in what you will or will not do based on the provider/client relationship!
Everyone is different. And we can celebrate that. But for the unaware, I think that some sort of leveling the playfield can only help someone who is oblivious, to start to make some kind of choice!