I think the Fossilizers could have been more popular with collectors if they were sold as "drones" (similar to the BM "Deployers"). After all, as they're just bones, they're not really "all there" to begin with. Sculpting more guns and other weapons into the parts, or even vehicle parts, could make them more attractive as "Weaponisers for BW figures", rather than strange, frail, out of place bones attached to chunky metal G1 robots". The inclusion of vehicle parts would be great for smaller BW figures, such as Rattrap, to ride too. They should have also made each mold in metallic, clear plastic, etc versions, for both Maximals and Predacons, plus small, "Targetmaster" styled ones that transformed from small skeletral creatures into weapons.
Such wasted potential...