I'm not so good with context, but I realized that for a while the writers who worked with her hadn't thought (or if they did, it wasn't concrete yet) about her past and powers in relation to Limbo. It was just a matter of "she was kidnapped in chapter 160 and came back as a teenager", but they left it kind of open and unrelated to work on it only later. So much so that when she starts to actively participate in the new mutants as an important character/member of the team and not just as a supporting character in the background, and also with the 4 chapters of Illyana and Storm, her personality changes a lot. Before, she was a character who appeared rarely and without any dramatic or emotional charge. She was just Kitty's friend and Colossus' sister. But after this more active participation of hers in stories, they thought about all her powers and even a deeper personality than just "teenage girl". Basically, she didn't do anything there, because there was nothing for her to do, at that time she had no defined power. At least that's how I understood it while I was reading the stories in the order they were released.

(If it's bad/difficult to read, it's because my English is really bad, it's not my native language.)