I can't edit my reply, otherwise I would correct it. I see now that the two replies were directed more toward the second part of his post, not the first, but at the time the two seemed much more closely connected, I don't know why.
At any rate, though, I still think he has some point. (I also think something like the jump from 2D to 3D is semi-excluded from this, that was kind of a given phase that game makers would experiment by putting things from the character's perspective now that it was far easier to do.) Not entirely, mind you, but there is some point.
I've got to say it, I know I'll be jumped for it, but maybe with the exception of Melee (and, post-dating, F-Zero), Nintendo hasn't really put out a GC sequel to a series that doesn't have SOME odd twist to it. It's strange that for all these franchises, not one of them has really had a traditional update yet. I mean, let's do a quick roll-call (this is observational, whether or not you agree with these choices is opinion). Luigi's Mansion, that's a given. Star Fox Adventures, Nintendo basically brow-beat Rare into altering Dinosaur Planet, an original adventure title into using Starfox characters and some mini-Arwing missions. Metroid Prime, HUGE controversy about taking it to an "in the helmet" perspective. Super Mario Sunshine, FLUDD as a persistent element and setting it on a tropical island, specifically keeping some level "themes" away from the game. The Legend of Zelda: The Wind Waker, a dramatic stylization change compared to the last two multi-million selling N64 releases and teased GC style and an ocean overworld (Not to mention a plot difference to pretty much every other Zelda game that I can't really say without spoiling). And now, Mario Kart: Double Dash, with dual character play being a central theme. Nintendo seems to be so scared of getting tagged with a comment like "It's XX, except in 3D" or "It's XX but with prettier graphics" that they're throwing some strange twist into EVERY game we're clammoring for a sequel for. (Some to the point where a lot of gamers get shocked by it, step back and reevaluate how much they want that sequel, like for Metroid Prime or The Wind Waker.)
I'm not an overly negative person about Nintendo games, in fact, I'm often very positive and optimistic. The trouble is some people act like it's a crime to EVER be negative about a new aspect. If you don't like something and you say it on an open forum, you're an idiot flamer troll who just can't see the brilliance behind it. It's especially true when Miyamoto is involved with the game's development. A golden example is The Wind Waker's dramatic style shift. You were simply not allowed to nay-say this new design choice, you were automatically an idiot with a worthless opinion for even THINKING negative of it. Miyamoto is a human. He can and may have (depending on your view of the item in question) designed, decided, or given his approval to things that turned out poorly. I think he's a brilliant game designer, but that doesn't mean I don't think he's made a few major choices I personally thought were bad for a game. (I'm not talking smaller implementation designs, but grander, "Here's what the series will do this time around" choices.) It's not a crime to feel that way, nor to say that you do.
Personally, I'm interested in the dual-person setup of Double Dash, although I have questions as to how much it'll really add to the gameplay (if it really will change things around while being fun, or end up just splitting up the chores "between" two people who'll still act as one). But someone's allowed to say they don't like what they see so far.