perhaps the fact that it looks absolutely unstable and useless first of all. weight distribution looks terrible. the entire thing looks like a bunch of soap boxes strung together. and a huge flat window so anyone can snipe the pilot to death.
it's a classic low iq design.
It looks about 1000% more useable and stable than the original Marauder, which looked like about 70 tons of its mass was allocated to the lower legs and arm "pods", strapped by paint stirrer sticks and the bead chain from an old bathtub drain plug, respectively, to a torso barely big enough to support the massive-center-torso-cannon-that-sits-in-its-left-torso-but-is-in-the-center-torso-clearly-always-but-actually-in-the-right-torso-but-no-its-really-in-the-center-torso-but-its-not, let alone have room enough of an engine to try to lift those massive cloppers.
The redesign actually makes a bit more sense in terms of proportion and weapons placement, besides the ricockulously huge cockpit.