The characters look amazing but don't have any depth to them. The gameplay itself actually feels very dated, from the invisible walls to the doors you cannot open to environments that have very little interactivity to enemies that drop weapons you cannot pickup. And some decisions are just inconsistent - for instance, you cannot jump over railings because of invisible walls and yet if you overstep a platform on the rope-slide you fall to instant death.
RAGE is anything but innovative. It copies games like Borderlands but does a half-assed job. The texturing is the biggest addition, but they butchered the quality by compressing it "down" to 25GB, leaving low resolution textures everywhere. And the pre-baked lighting is actually a backward step from even Doom 3, especially from games like Far Cry 2 - it's easy to get good performance if you pre-calculate virtually all the lighting.
"The price of freedom is eternal vigilance."