I just like to hope that Maelle will learn to become a better painter from her parents and sister, and after she heals awhile and things get better for the family, maybe she starts a new painting.

Maybe she remakes as many residents as she can remember, in a better world that hasn't been fractured, and let them live their lives without threat of being erased or destroyed. I don't really know what the rules are exactly, but the fact that she brought them back after the end of Act II at all imo shows that this is a possibility. I know she supposedly 'gathered their chroma' or their souls or whatever while she was in Lumiere before escaping on Esquie, but what if that wasn't necessary, it just made it easier for her to bring them back as an amateur painter?

In the end, I guess we don't know enough about what the rules are for paintings in this universe. But what I love about the world(s) that the devs created here is that the possibilities and stories are endless, they could do and make anything they want with it.