I think you are just talking about your personal preferences.
These criticisms have zero to do with personal preferences. I'm fairly confident that any concept artist would agree that characters should be memorable and easy to distinguish from one another. The design should be strong enough that if a 12 year old drew your character, people can still tell who it is supposed to be. These are industry standard basics that have nothing to do with what an individual does/doesn't like.
For instance, I don't like Astarion. But he is well designed. It would be silly and pointless to critique that.
