No she hasn't. Liu jumped whole hog into the circling without ever developing why they'd even be friends. So far between the Kyle whinin, his and Northstar's over sappy relationship, the insta-friendship of Gambit and CeCe, I am horribly under-impressed with her ability to show or develop relationships in a comic. She managed to do so with X-23 and Jubilee the best and X-23 and Gambit by default that Gambit fans already knew of his childhood and his desire to help kids like himself (young Storm). Her decent use of Gambit outside in fights where he wasn't wallpaper is the only thing that saved x-23 for me.
I'm not hating Astonishing but there is nothing in it and that includes the Gambit and CeCe "friendship" that impresses me in how its been portrayed or developed so far and she's had time so I'm not all expecting anything great in the future. Good yes, great, no.