Sorry, this isn't very sales-y, I guess.
I'd love to hear you elaborate on this some. Is it the presentation, the increase in scenario since OoT, handholding...?
Yes, yes, and yes?
The core gameplay loop in Zelda is way too exposed, the dungeon -> item -> get stuff on worldmap -> repeat thing has been honed to a joyless tedium. Zelda is full of rewards that mean nothing (heart pieces when you can't possibly die, rupees that can't possibly be used for anything, bag upgrades to help you hold more of items you are pre-arranged to only need once or twice in a dungeon) and puzzles that are boiled down to the point of predictability.
Zelda 1 is a much rougher game around the edges in many ways but it also knows what it's about in a way that the series really hasn't in years. Link's Awakening crammed more depth and genuine surprise into the formula than anything else has managed since. Majora's Mask works in a completely unexpected and unrelated temporal angle that gives the whole game an extra layer of interest. The third-party Zeldas hack in RPG elements or attempts at action-game combat or other new stuff to freshen it up. Any of these would be a better template to iterate on next time around than just digging out the OoT map and tracing its contours again (much less the gimmicky nonsense in the DS games.)
The same thing that's wrong with every iterative sequel. At least Mario Kart only comes out once per platform, I guess.
MKDS was the first (and only) one I thought actually struck a good balance since MK64, and it had the single-player challenges which made it a bit more engaging. It still has that Nintendo elderly-person iteration thing though where they usually add nothing new, do nothing interesting to shake things up, just move the parts around a bit on the board.
I do think it's fundamentally true, though (
only instance of sales content alert) that MK is basically fundamentally fun to play with friends in every iteration, though, whatever flaws it may or may not have, which is part of why it remains wildly successful, while Zelda is basically becoming less fun and certainly less exciting for the casual audience that used to buy it with every iteration (and I think that's true in all territories.)
Mario Kart isn't for me, and I'm not that fond of Zelda, but I don't really understand why someone would want the series to halt.
It's Nintendo, right? They're not going anywhere. I think taking such a long break from Metroid was pretty beneficial inasmuch as it brought about Metroid Prime and I think Zelda could use the same treatment at this point.