If I remember right it was her decision and she announced it to Bernardi. He just agreed but to be honest I do not think that he really want it. In the next season Novara will have Tolok, Ishi, Lina and Herbots in the OH and only Mims in the OPP.... I guess the team wanted to extend her contract and they thought that after time they will persuade her to play as an OPP again.
Tris need to go to fairy-tell section.