To me it is fine as is.
I bring very little kitties to menagery though: they've cost me more to make and they might come to good use on a given moment.
Once in a blue moon I obtain myself a Tiger or something but at the rate they bring something new there is nothing I don't have.
Even Genesis cats can have more value in certain projects.
That said I do not think they should give us more K$ for a cat and most definitely not trait biased.
Keeping the Secondary Market clean is close to impossible I think and is at most an effort individual breeders can make.
Although when a new menagerie cat was introduced I saw people go beyond and above to get as many as possible as soon as possible to the point they've brought in their LE's it is a temporary hype I think