Token of replacement and the ability to trade Vet rewards is an awesome idea, and lots of life comfort, that is beyond their ability to conceptualize at the moment.
Same thing as their inability to conceptualize the benefits of the idea of items in game that would allow you to re-STAT pets that are finished and loaded with priceless 120 powerscrolls, and also preventing "statuette" born pets vanishing to this air as soon as they are "wild" released etc. Like Triton, Paroxy Dragon etc.
We can only dream .. one day..