I didn't like Mockingbird Lane, it wouldn't have lasted long if it had gone to series. The characters were way too different from the original series, changing their personalities like that took away from the charm that everyone loves about them.
That's important to the series, but what will be the key factor to having this be anywhere successful is getting the right actress to play Endora.
Whoever it might be is going to have to coming up with an entirely different spin on the character or they'll just be a pale imitation of Agnes's...