Thats not true. She was not a central figure for years after AvX. She most certainly wasnt when she returned in the ResurrXion era or post Disassembled UXM. Hickman and now Gillen have prepositioned her to be so.
Kwannon was the lead of Fallen Angels and Hellions. She was central to the main plotlines of those books in a way that Iceman has not been to any title this era. At the very least Bobby needs that but he hasnt been used in that capacity