I'm really not sure how you can objectively evaluate the appearance of an animal. Everyone has their own preferences and I feel like whoever puts together this council (I'm assuming there would be more then one person judging the "quality" of each morph) will want to test the other member's ability to judge quality. This would be flawed in its own right because that would mean they would all have the same tastes or similar tastes to begin with.
Let's assume that instead of considering a specific set of traits as desirable we consider both ends of a spectrum as desirable, for example instead of considering minimal spots on a banana as the only standard we consider both high amounts of spotting and low amounts of spotting as different lines/breeds/characteristics. At the end of the day after considering every variable trait of every base morph (disregarding combos because that would be sooo much worse) you'd have so many different lines it'd be almost redundant.
I think it really is best to leave it up to the customer to consider what they think is a quality animal. Let them do the do-diligence to think ahead of time about what they want in their breeding projects (if that is why they are buying the animal) and evaluate whether the animal they're buying will help them reach their intended goal.
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