So I discovered today that to fix an old bug, this was implemented back in December:

* All decors now correctly lose a use when a cub becomes the new king of a pride instead of just the 0-use decors being removed.

My understanding of this bug was that the lion wasn't supposed to lose a use on any of the decor when going from heir to king, since it's the same lion. But it seems what this bug fix did was that instead of making it so only the 0-use decors on the lion would 'lose another use', hence deleting them, the lion now loses a use on all of its decor upon kinging.

Rather than making it so that the lion now consistently loses two uses off each decor it's wearing when going from hoard -> heir -> king, I think it would make more sense if heirs didn't lose a use off any decor they were wearing when kinged.

To sum it up:

Currently:
10 use decor -> 9 use decor on heir -> 8 use decor on king
10 use decor -> 9 use decor on king
1 use decor -> 0 use decor on heir -> deleted from king
1 use decor -> 0 use decor on king

What I think would make more sense:
10 use decor -> 9 use decor on heir -> 9 use decor on king
10 use decor -> 9 use decor on king
1 use decor -> 0 use decor on heir -> 0 use decor on king
1 use decor -> 0 use decor on king

So to fix the 0 use disappearing bug, rather than making everything else lose a use, just remove the logic to remove the 0 use item when the lion's kinged.

I'm open to opinions on why the current system would be more logical than this.