this part caught my eye though,
Duncan Botwood: At their cores they carry the same mechanics, the same weapons, but the fundamental difference is that in multiplayer, you will be playing against other humans. This adds an element of uncertainty to your opponent’s actions. The multiplayer levels do not use graphics taken directly from the Story mode, but they share many of the same textures and where possible are themed on the Story mode levels to provide that visual link. We did experiment early on with using the Story mode levels, but the time taken to adapt these for use in multiplayer was longer than it took to make a new multiplayer level from scratch.
if all or most of the unimpressive screens we have seen so far are taken from the multiplayer then that would explain some of it to why they look like ass.