I do agree with you. Gyul's voice is awesome, she can have a solo single. Besides, when she will have a solo song, it will be a hit and it can icnrease Kara's popularity too.
Although I don't know Gyuri that much, I know that she is a very good leader. And according to waht you said too, she welcomed Hara & Jiyoung depsite of Antis.
Picture's not available -..........- N-ways, even if I don't see it, I love it on both. It's really hard to schoose since I really adore those two [Although for Sica, .5%?haha.].