There's already been discussions about it off site, but unfortunately (On VSBW anyway) we can't really justify making shit like the Triforce of Power 5-A via scaling to the secret stones (Not like the stones themselves are 5-A, only straight up user of one that's on that level is Ganondorf himself, everyone else that has one either gets god stomped or one shot by him). Like yeah I agree that it makes sense that Ganondorf with a piece of the Triforce should be superior to the new Ganondorf that doesn't have anything to do with the Triforce...
...buuuuuut since we have a whopping 0 comparisons or connections between the triforce pieces and the stones there's not a whole lot we can do to justify the scaling. It's the same deal as to why we never scaled Triforce of Power Ganondorf to full power Majora and instead basically rate him as fodder compared to the funny demon mask. It's easy as hell to scale the complete Triforce above anything not named Din, Nayru or Farore (Not that it needs that scaling, 3-A sacred realm feats goes brrr) but trying to scale individual pieces of the thing is uh, not easy. Hell we barely got away with making TOP Ganondorf scale to just one of the four giants and that was just because of funny light arrow shenanigans not because he had the Triforce of Power, I mean we did kinda scale him to them before for that reason but even then it was only as a possibly rating, he still had an island level low end to go along with it since we weren't allowed to go full on High 6-A without something that directly said that triforce pieces > giants.
I'd love to have peeps like TP Link scale to large planet level, but as it stands no chance we're getting anyone not from TOTK to 5-A (Again at least not on this site).