tyrion couldn't die in adwd because his character arc is not complete. and i think he's meant to play a major role in dany's entourage when she arrives in westeros.

i know you don't want her to arrive, but you must admit that is where the story is heading. what's not clear is if she will sit the iron throne.

what do you think stannis would do if she arrived and asked him to bend the knee? is she the rightful ruler? i don't mean do you think she'd be good or is worthy but as the last (not sure about aegon) targaryen, does the throne pass to her?