Well, I suggested native because they seem like they're mostly found in the (Spelljammery regions of) the Material Plane. I'm not getting enough Law from them to go with the Lawful subtype, but you could convince me.
Keep tremorsense, as that's pretty spidery. DR 5/bludgeoning makes sense, but the original stats have a harder time justifying the energy resistances and immunities. They might work, though, especially for the spinners. I don't really like earth glide for these.