I don't mind that the author is revealing that there's more to Angela's character than we might know. After all, it makes sense that if we only have Jayna's viewpoint, we'd only see her as a two-faced villainess until Jayna herself learns more about her. What I find disappointing is how little Jayna's character is developped. In the original timeline we don't get the sense that she was all that interesting. Her goals seemed to basically be "don't rock the boat, marry the person I was engaged to all my life and be a proper wife". Which makes sense, she was a "generic" well-bred young lady in a comfortable position. So long as the status quo was maintained, she would enjoy a comfortable life. But as a character, it's kind of boring.
She then gets framed and murdered, travels back in time, and her new goal in life is... take revenge on the people that ruined her, then slide right back into her everyday life. Eventually find a new husband since she's dumping her fiance as soon as he gives her an excuse. So she went through this miraculous experience, got the chance to go back in time and redo some critical choices, and her only interest is to have her revenge.
And the somewhat annoying thing is, she doesn't really strive for things aside from her revenge. Everything kind of falls into her lap. For starters, I'd like to know what kind of power decided that this entirely boring person deserved to have a second chance and go back in time. Or the whole thing with this kid and the rabbit. She hasn't really shown anything remarkable, aside from apparently liking the rabbit and being understanding of this strange kid. But he's clearly someone important, and the rabbit is special too, so because she humored them at no particular expense to her she'll be richly rewarded when their true identities are revealed.
I wish Jayna would do more introspection, seeing as she has solid evidence of higher powers and the possibility for someone to go back in time, and maybe reexamine her choices and her way of life. Show that she's changed in some way aside from her desire for revenge.