The Second Coming Of Joanna

Joanna Lannister bears her mother's name and has succeeded where her siblings couldn't: making Tywin proud. Joanna has Jaime's swordmanship skills, Cersei's love for those she deems her own and a wit that bonds her closest to Tyrion. She's everything the other three aren't, at least not on their own and so far Tywin has had nothing but praise for her.

Will things always stay that way, though or will Joanna prove to be as much of a disappointment as his other children? If so, what reasons will the old lion lament about? Or will he perhaps come to see things the way he had once seen them, before his beloved wife closed her eyes to the world?