[user104658]

If Gina had gone early, the whole series would have been completely different - and probably better. As an individual she was a big character and had her moments but, let's face it, she stifled almost every other character in there including Dexter because for some completely unknown reason, they were all bloody terrified of her and everyone bar Hazel went out of their way not to upset her. She stopped the series being all that it could have been. Sallie on the other hand, would have blundered around causing some more drama for another week or two and then seen the boot anyway.