Let me rephrase:
I think Zelda was more like the kind of game consumers now expect back in the 80s. It's actually really well documented that Zelda took inspiration from Ultima, an open-world computer RPG. Zelda was also marketed and received as an RPG, albeit a new kind of RPG that only Nintendo could produce because of their pedigree making arcade games and arcade-like console games.
I do not think Zelda has been that kind of game throughout the 2000s and 2010s. I think instead it was more like Aonuma's Marvelous, which while partially inspired by A Link to the Past is really a very different kind of game.
I think that Zelda U is a realignment with the current market pulse, sure, but I also think it is (or should be) an alignment with what Zelda used to be.
In that sense, it's less that Zelda is conforming and more that at some point Zelda's developers decided to completely change its identity in an experiment that basically failed. I think Zelda has basically been leaving the growth in the open-world console RPG market - which it should have been taking advantage of all along since that's a genre Nintendo pioneered, with the Zelda series - on the table, and they can no longer ignore this with their current popularity/financial situation.
I get that your point is Zelda is merely returning to what it once was, does it matter though? How can you call 20 years of Puzzelda a failed experiment, that view just doesn't make sense. Especially when the Puzzelda aspects keep getting worse (from your pov) with each installment: PH, ST and SS are gimmick-heavy, linear games. It even got to the point where the overworld in ST was completely gone in favor of a glorified level select map that connected areas with the train minigame. This is what they want to do, but are no longer allowed due to poor sales. I argue that they are reluctantly giving you what you're asking for.