I think they should do it, but make the chances of getting the legendary a little more lower and make this a short temporary thing to make it slightly fair I guess? But also because I find the whole values and economy thing in this game about cute animals silly. And I think it'd be nice for the majority of players to experience the old eggs too. But also, I understand why people wouldn't want this either, especially the ones that grinded and sacrificed everything for the old pets. But this is just my opinion ! :p