That's not a good film. Miyazaki's son is kinda of terrible. Trying to keep Ghibli in the family is a bad mistake, Ghibli needs a new lease of life right now.
Tales from Earthsea isn't a bad film by the way, it just isn't as good as most of the other Ghibli films and suffers as a result. But it's still watchable, and if you like Ghibli it is certainly worth a look.