Correct me if I am wrong, but all the spells on the list are (obviously) copied from existing spells. (at least to my knowledge). I also notice the lack of 0-level spells. Not a huge issue, but it did bring an idea to mind. You can take it or leave it as you see fit of course. But if you incorporated 0-level spells from all sources (and possibly all classes? I dunno on that one) as an at-will thing, I don't see it being too broken (if I am wrong, correct me). This could at least give the planeswalker more of their "Constantly spellslinging" feel.