De ja vou Kim Tate did the same. Its a soap, there have been far worse storylines in Eastenders. Personally i like the King family, and no not because Sadie is part of it, i just think they bring a bit of glamour like the Tate's did.
I think the whole idea for bringing the King family into Emmerdale was to take over from the Tate's, and with obviously no Tate's left once Zoe has gone, they have.

And before you compare Patsy to Claire, Claire can act, im a huge fan of hers and yes she can act a lot better than Patsy