We (myself and two others) accompanied a judge at a local show to learn how to judge. I recall four things not mentioned above.
She looked at points: where they meet and were they chopped off.
Is the quilt clean meaning strings floating on top of the quilt and/or hanging out of the seams and also for animal hairs.
She checked the binding, its consistent width, and particularly the corners as well as it being full as mentioned above.
Lastly, she would fold and measure (just the best four or five remaining for ribbons) to make sure the sides are the same.
I haven't judged but have been judged.