I'm REALLY against their opinion.
Look at yourselves!!! EDGE succeed to make you doubt about the game's capacity.
Were you complaining about Super Mario Bros 2, which was so close to Super Mario Bros 3, in fact almost the same?
I LOVED the DS version, so a game with even TONS of new features like that will be mine, of course.
Why do Nintendo has to change the graphics? And HELL, they changed it! Look at those doted mountains behind, they are awesome! Clouds! Look at how Goombas are! If you doubt about the game, just rent it. Nintendo said it: You have to play the game to see how details has been improved. Graphics in Mario Bros 2 and 3 were almost the same, and in this version, they aren't the same than in the DS one. Stop complaining on that and play for fun, just like in old days!
And, for those you think it will not be a long game, the guy who said it was about 6 hours said with 4 players, it was about 15 hours without collecting Coins.
So, the game will have a great replay value and will last about 20 hours + Toad rescue + Coin Battle + Free For All
Remember that Uncharted lasted 10 hours maximum.