PSU is apparently a pretty poor game, I'd stick with WoW.

Fortunately, you shouldn't need to actually buy Burning Crusade when you start playing, it's not really worth it until you're in the high 50s.

I agree that it is a very stupid and incorrect score, but in essence it's all due to the GS scoring system.  By giving gameplay 8 (no idea what that's all about) and sound a 7, the total score got dragged down.  I mean look at tilt - 10 out of 10.  They clearly tried to drag the score back up somewhat.