[気味「きみ」]だ => Like A, Looking like A (is happening) N2
Adjectival, Descriptions
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
[一方「いっぽう」] => On one hand A, on the other, B; Although A, at the same time, B N2
Contrast,Surprise