what if a 300q bear was actually 2-3x stronger than a 60q bear? I think that would be cool
you could also modify the model size of the animal based on its quality. So a 60q bear maybe would be 80% of the current size. and a 300q bear might be 125% of the current size. You could have "brackets" for animal sizes as well so some custom client cant calculate the exact q of the animal, they would only know its in a range from like 60q to 89q, then 90q to 159q, then 160q to 300q+.
This would also allow people to not have to kill every animal in sight to know the quality, they would be able to visually tell if the animal is strong or not.
because you cant really die anymore, I think making animals more dangerous would be cool. You could also increase the aggression of animals the "bigger" they are, while weak ones would be more timid.