The Reincarnate ability is both interesting and flavorful, and I like how you've expanded the class, though again, unless you do plan on giving her arcane progression, she has no offense, only evaluating and altering others. If you wanted to make her some kind of buffer/debuffer than you could always give her at least a bard's spell list progression and perhaps some class features where she bestows temporary Modifies to her allies.

Just suggestions, of course.