I wouldn't call it merely an expansion pack. GRAW2 has a lot better graphics with amazing looking effects (IMO GRAW2 is the best looking game on the market), it has a new single player campaign with 12 missions and some big gameplay enhancements (CrossCom2) and new multiplayer maps and coop campaign. It sounds like a pretty neat package. Of course it might be not worth 60$ dollars for you, but that's obvious not everyone would spend this amount of money on every game out there. I myself won't buy it either, but only because a friend of mine buys it and he'll lend me it in few weeks.
If you think about it, God of War 2 offers you 'only' the same gameplay in a 15 hours long single player and nothing more. Is it only an expansion pack? No.
If you think about it, God of War 2 offers you 'only' the same gameplay in a 15 hours long single player and nothing more. Is it only an expansion pack? No.