Well, Wild Child and Orphan Maker are noticeably different from what they were in the pre-XoS issues of the series (even if it mostly amounts to Orphan Maker turning into a teenager rather than a younger kid, while Wild Child is in heat). Nanny, not seeing so much - she's mostly been reacting to OM no longer being a "young child" by moving on, but I could see that happening anyway.
Dazzler was also M-Poxed, wasn't she? Which just got forgotten after IvX (not just with respect to Dazzler, everyone), in spite of nothing actually happening in that series to help those already-afflicted. They just got rid of the mists so there were no new cases.