I still cannot quite grasp why people always focus on the specifics of what they can do in Souls games. To me the biggest draw is the mood, environments, atmosphere, feels and mystery, paired with generally punishing gameplay and careful exploration. Everything else, no matter how good it might be, comes second, and ER delivers those first things in spades.
In a recent interview Miyazaki said this game is what he and From wanted DS to be from the very start, but they didn't have the skills, money and technology to pull it off so they took it step by step.
I agree with you that the unique appeal of From games is in their atmosphere, exploration, challenge and for me, memorable boss fights. I don't agree however that Elden Ring delivers on any of these fronts besides challenge, which is more due to the schizophrenic ADHD nature of the bosses and frustrating poorly designed duo battles
for me the game has next to zero atmosphere, the only time it feels close to atmospheric and grounded is when you're in a Legacy Dungeon or anywhere but the open-world, and even in the Legacy Dungeons you're jumping across rooftops and skirting the edges of castles as if you're Spider-Man.
the overworld itself is not atmospheric at all, you teleport everywhere constantly (#1 sign of a poorly designed open-world), double-jump all over the place, mow down endless trash mobs and loot everything you see, and when you see a mine, cave or ruin you skip over it because you know exactly what's in there, which only reinforces the feeling that you're playing a game with repetitive content, not undertaking an actual adventure of some sort, gamifying the feeling of the world and removing that sense of wonder
the careful and methodical exploration of Boletaria, the suffocating atmosphere of Latria and its bloody depths, Elden Ring could only dream to reach those heights
and in regards to what Miyazaki says, what does it really matter? the final product is what matters and what I'm judging, I couldn't give much of a shit on what he personally thinks. Miyazaki also said "All of Dark Souls 3's design is basically based on my own personal preference," and we all know how that turned out
creative director of the Oddworld series Lorne Lanning says that Soulstorm is what he originally envisioned for Abe's Exoddus, yet it's an abortion of a game, so why should I care about his opinion?