I think what most folks in the media have a problem with is that there isn't much to Radiant Dawn that warrants it being on the Wii. If it wasn't for the FMVs, the game could have been exactly the same on the GBA or DS (much less just releasing it on a Gamecube disc). I think that's what he may have been talking about about it not being 'next gen'. Though he does say:
While some gamers will scoff at this fact, diehard Fire Emblem fans already understand the choice made by Nintendo, as the series hasn’t needed to change in nearly 20 years, and shouldn’t be expected to now.
In all, the game still got an 8, which I guess is good if you pay attention to numbers.