the Rifts themselves are the only real difference between this world and any other fantasy hack and slash.
Try making a game where the technology matches the time period or that magic, so often used as high etch, instead of high tech, just makes the game seem like its catering to the wizards out there that want power without reason. Theres little to do besides kill and grind, just like any other game, the towns seem nice to see but even there theres nothing different to do. Gathering and manufacturing is average at best and what you make yourself has no special properties that you cant get from drops, again just average fare for the fantasy players out there.