Except you still couldn't move and fire at the same time, there were still randomly floating barrels for no good goddamn reason, and it's one of the two times in the game that enemy placement didn't make any sense, what with them being in all sorts of completely inaccessable locations that Drake has to get pretty damn intrepid to get to (the other being in the treasure vault, as soon as enemies start appearing, they're all of a sudden in front of you).