Rather, why not just give the previous owners an extra feldrake and same goes for the other mounts? I mean, we spent a certain amount of gold on them, so that way we can get back some, in some cases more.
The problem here is that “claim mount” does nothing if you already have it, if “claim mount” gave you another in inventory or by mail, at least you would have a compensation, although the rarity would still be killed, but not giving compensation is just an insult, just like OP said.