Rather liking the upper torso of the mech - squish it down so you cut out the gangly bit in the middle, and you'd probably have a decently workable design. Wouldn't function as well for the joke, though, and I think the joke's worth having a design that could get cut in half by enemy fire within twenty seconds.
...And if it has viable single-player content you own my soul. I miss good (never great, unfortunately) mecha titles of yester-year. Starsiege stands out in my mind, maybe because it had such a campy and predictable story. Still a fav, though.