I mostly agree with Yahtzee but think he really missed a few points here. For starters Spore is arguably the first GAME (or mini-game collection) Will Wright had designed. Will Wright is known for developing entertainment simulation software. The distinction being that in most of his games like The Sims, Simcity, or Sim(whatever), there isn't really a point other than any goals you set for yourself. There is no real endpoint. Spore is differant given that there are clear goals (Evolve, and dominate the galaxy) and a point where everything ends.
Given his EVE Review, Yahtzee should know this. He himself talked about the differance between a game, and an executive toy for those who don't play games, and you run in the backround and tinker with occasionally. That's more or less what the overall "Sim" series was, and it succeeded by not really being a game, staying easily understandable, and dumbed down enough where anyone could do it, oftentimes without even really needing to focus. Something to twiddle with on a lunch break, or kill a couple of hours for some goober who wants a computer toy but doesn't want to be a gamer (or thought of as one).
Spore was an attempt to create an actual game, that was simplified to the point where it could appeal to the same demographic. People are disappointed because of the sheer potential here, but they forgot that this is Will Wright, he doesn't develop deep games. That's why everything involved ultimatly comes down as being like a simpler version of something else, all of the aspects of the game being easily recognized to a gamer.
The technology involved is impressive, some aspects of Spore will inspire game makers for generations I expect. I also anticipate that the game will succeed, but won't be a monster success like his "Sim" lines (though I could be wrong).
Promised potential like early evolutionary desicians impacting later stages were either misrepresented or removed. I was lead to believe that Spore was a game where you could say make a race of electrical generating beings, and then develop technology based on them being their own power source. However, for the most part you don't even develop technology. Of course noone should be surprised by things like this, because after all that isn't what Will Wright does.
Basically I think Yahtzee was on the money for the most part, but I think he was wrong to compare Spore to like "The Sims". Especially seeing as he himself sort of made the distinction between a "game" and a "computer toy" not too long ago. While they share a developer in common, Spore and The Sims are entirely differant species.