A lot of Zelda mentions.
The series has stalled since LttP, IMO. With Mario, at least you can say there's been a revival with the Galaxy games (being better games than some of their predecessors). Same with Donkey Kong and Metroid. But if someone were to argue that the Zelda franchise has been gradually declining, I'd be hard-pressed to say otherwise.
Lol I'm not surprised at the Zelda mentions, which is a series most wracked by nostalgia, at least as much as Mario.
Saying it's gone downhill since a game as old as LttP is, for me, a big stretch. Nearing that guy who says every Zelda past Zelda 1 is designed wrong.
I couldn't say Zelda is declining at all, Skyward Sword is the best of the 3D games in most ways, and laid a good foundation for gradually opening up Zelda in terms of storytelling and characters. The portable Zeldas were all fine games, even Twilight Princess was great aside from too slow of a start.
The problem with a series like Zelda is I remain pretty supicious that if you pulled a Folger's Coffee Challenge and replaced Link with anonymous hero, changed the name, and had Zelda fans play it: they'd rave that this had the magic Zelda had "lost". And say that Nintendo should hire these guys and fire those idiots that have forgotten how to make Zelda.
We saw this when some Zelda fans played Darksiders 1, and went on about how it was a better Zelda than Nintendo could make anymore, when Darksiders 1 was just trying its best to copy Zelda almost to the last detail, and is merely a surprisingly good and competent Zeldalike. With more detailed combat sequences between dungeons.
Because most developers would wish they could make an action-adventure game as nuanced, polished, and detailed as just about any Zelda with such a high level of design in almost every detail. Very few in the world could do it. Zelda fans though... lots of people dislike the nostalgia goggles accusation, because they think it's an attempt to dismiss real criticism. Sometimes it is. But Zelda is a series people worship out of childhood memory and it's a bit suspicious that so many Zelda fans only truly like the first couple of games (whichever those are) that they played.
I would flat out state there has never been a bad, or even only "good" Zelda game. Period. (Not counting Zelda CDI, ha ha.) But the series suffers a tremendous amount of projection onto it.