It feels muzzle heavy, but that doesn't always mean "bad." The balance feels "off" somehow. Maybe it's BARREL heavy, with the weight evenly distributed. It just feels like a slug. Say what you want about the Nova, but it doesn't feel sluggish.
Muzzle heavy can be okay. Ever feel a swamped flintlock rifle? Some of those guns are nearly 6 feet long, with barrels that are narrow in the middle and flared at each end. They might be objectively muzzle-heavy, but they balance wonderfully. Weight distribution matters a lot.
American Rifleman (not usually known for ANY real criticism) said the same about the 887, as did Gun Tests, BTW. I'm not alone in this opinion.
That's what surprises me. With the whole thing covered in plastic, it should be really easy to shift the weight distribution.