Kage Kage no Mi

Why didn't Gecko Moria ask sen goku to be allowed to steal the shadows of impel down's inmates.

The criminals are unable to left the dungeon or they die. When their execution day arrives. Moria would release person's shadow.

For anyone that remembers thriller bark or the time skip, there was a character referred to as "princess Perona", aka the "ghost princess".. doesn't it seem a little odd that imu's devil fruit has been compared to moria's? And their names rhyme? ( Not sure if that's the case I'm Japanese but still..) Oda is not one to leave things up to chance, in fact I'd say every mystery in the story that could possibly be a coincidence is almost surely intentional.. nevermind the fact that we really have no idea where she came from (and she is oddly comfortable around mihawk, someone who has been stated to have similar eyes to imu.)

Remember the Giant shadows near thriller bark that has long yet been unexplained? I think this is actually the best explanation.. its imu and the five elder stars.

Do you think this devil fruit would be useless in single combat? I mean, would it be useful in combat when there is no shadow nearby to steal or control? We saw that Moria couldn't do anything against Jinbei. What can this devil fruit do in an Arena like Dressrosa? but instead of "Shadow man" he is nicknamed "Lord of Shadows" and the look of the fruit is very cool. I wonder if Moria can cover himself with a shadow like Megallan covers himself with the poison he created?

I was re-reading thriller bark and was thinking about Morias devil fruit. so anyways my question would be if Moria steals a shadow from a devil fruit user (person 1) and the shadow goes to a dead person who is not a devil fruit user (person 2). so if person 2 eats a devil fruit and person 1's shadow is returned would the devil fruit power go to person 1 and kill them or would they live. or would the devil fruit become the nearest fruit like when someone dies with a devil fruit, or would that not happen because person 2 is already dead.

Can the user still be able to steal shadows from dead corpses or no?