MAG looks fine consider the early nature of the build and the core premise - 256 players online. To be honest if the final retail looks like the trailer and is 30fps with 256 players I'll be impressed.
Look at the average number of players on PS3/360 MP titles. This is a huge jump. You can't just magically go 'I'll have KZ2 visuals plus netcode and engine to handle 256 live players all doing stuff at the same time' it's just not possible.
I see no way how PS3 (or 360 for that matter) could support 256 players without the game taking a graphics hit.
If you want something that looks like KZ2/Gears 2 (or better) and 256 players I'd say you're talking about a high end PC and dedicated servers.
My only two concerns for the game are:
1) is is fun to play? does the major battle concept work?
2) is it stable - i.e. framerate, graphics and response well balanced to support a pleasant experience
I'm sure 2) can be achieved without the thing looking like dogshit - the big question I'd say is still 1).
Try to be reasonable... its easier than you think...
