in the documentary they showed quite a bit of gameplay, and i didn't find any thing that looked to challenging. all i saw saw was war killing things incredibly easy. there was no dodging or combo moves there either. i hope they show more in dept gameplay soon.
I'm sure it's going to be deeper then what they showed. That was just a sample of the game so play mechanics and stuff probably are still being worked on. It looks like a decent game though, the visuals are stunning and you can't go wrong with Joe Mad.
I agree with Wordsmyth, the producers are probably just showing what Darksiders can do and what the general idea of the game is. Plus with an adventure game with this you can nearly garuntee there will be multiple difficulty levels. Plus these guys would probably be like pro gamers and i know that im no super video gamer man so it probably will even out. But this game really looks cool, im trying to get a 360 now and this will definately be on my have to get list