A 6? Really, Gamespot? Let me tell you what I think of that.
I played through Path of Radiance probably 20 times. I went through every difficulty and tried many different unit combinations. That's the beauty of it.
With even MORE choices available to you in Radiant Dawn, including 2 additional characters that can join your party the 2nd+ times through, i found it was almost irresistible to play through again and again.
I feel as if people have begun holding unrealistic expectations for Wii games. The Wii isn't a PS3 or Xbox 360. It can't handle incredible graphics and events at once.
Graphics don't make the game.
The game makes the graphics worth it.