During one of the big photo displays shown at New York State Theater (yup, stlll NYST to me) is one of Adams and Nora Kaye in, if I remember correctly, La Gloire. Kaye is in slippers and a sort of Robin Hood getup, whereas Adams is in a soft short tutu or dress and on pointe. Both are in arabesque. Kaye's is textbook 90 degrees and there's a very electric intensity to it. Her head is very rigid and dramatic. Adams' arabesque is so big and generous and full. Her head is thrown back slightly. Both arabesques, like the women performing them, are glorious in their own way. And so fitting to their dancers' styles.
Your description of Adams has captured the Adams I admired during her BT days...generous and full. The famous lilac fairy variation with the sissones has never been performed better; I can still see those long legs swinging up in extensions----the same quality that made her Myrtha so exciting. Her big movements were wonderful to see.