The missing bracket

I want to start by saying that the brackets are an amazing idea. A system Wich is clear enough to make ground rules and obscure enough to make it so people have to talk about it is amazing. But to me it does feel like we are missing a bracket. For this example I would like to give three examples of decks. All decks made by someone I know. https://moxfield.com/decks/cQQk4HZ3cU6ySAAsXDCOMQ

This deck is a solid 3 on the bracket scale and I believe most people who play against it would agree with that statement. It's a solid trying to kill you with zombies. It does have an infinite combo in it, but the contest of the deck does not make it feel out of place or oppressive to play against.

https://moxfield.com/decks/BadykxzGzUWUoN9yLtUrSg

This Magda deck easily slides into bracket 4 with it's absurd power level and consistency, without fielding all the cards Wich would push it into bracket 5. From what I have seen, bracket 4 has become a bit of a cedh lite, and I feel like this deck would definitely not be out of place.

https://moxfield.com/decks/CSwRWnZBPEePIydhuH18IA

And here is the reason that I make this post. This zuladok eldrazi deck is powerscale wise very weird to me. It is far to wear to sit at the same table as the Magda deck it just ramps, plays big creatures, and cascades. But if anyone has ever played against an eldrazi deck, they know just how absurdly strong they are and how much ramp they get. It's way to strong at bracket 3, but I believe a lot of people in a bracket 4 deck wouldn't care about almost anything it does.

For this reason, I believe the bracket system is very flawed. While I definitely believe it's miles better then the old 1-10 system (with everydeck being a 7) I do believe we have made it to limited with the number of brackets we have now.

Do you guys agree, have you hade these experience's yourself, or do you feel like I'm being way to difficult with it?