Shanks still has 0 DC feats. Cope.
It´s all about Shamrock these days, so I don´t think it matters anyway.
I mean you would agree that Minato was clearly portrayed above the Sannin in Part 1, right? It was never stated anywhere in Part 1 that Edo Hashirama and Tobirama were only at a fraction of their power. Kishimoto simply believed at the time that Old Hiruzen was >= them, the same Old Hiruzen who was at best relative to the Sannin.
There´s matchup, Hiruzen could seal them because they were mindless zombies. In a regular 1v2, he couldn´t win without the death seal.
Also, old Hiruzen isn´t capped below Tsunade and Jiraiya lol. He was no longer entirely sure about him being able to stop Orochimaru, but those two couldn´t stop him *either*.
Things about Kisame can be added overtime, like a moniker. But there´s no chance Kisame wasn´t introduced with the goal of being an incredibly powerful shinobi fit to be Itachi´s partner(at the time, Sasukes eos goal). He was essentially playing with the Jonin. By this logic, we might as well say Kizaru vs Rayleigh was retconned lol, since Rayleigh didn´t show advanced haki nor create explosions like Garp, nor did Kizaru create clones or some of the other stuff we´ve seen from him. I never said both series didn´t change their scale overtime, just that the actual scaling in relation to that didn´t inherently change.
(Though if you believe both pre TS´s have been retconned, I would still disagree, but it would be consistent I guess).