I can't help but feel that their corpse-jockeying abilities aren't even rating a mention here.

As a full round action, you can generate a corporeal body with your HP total an unlimited number of times per day, as long as corpses are available. And humanoid corpses usually aren't in short supply.

This is pretty amazing for exploration, infiltration, trap-springing etc. It adds a lot of versatility to the chassis.

By my reading, if you jump into a corpse with a natural bite attack, you can still deliver your poison without the -4 to hit and provoking AoO. Does that sound right?