I noticed that too. Just my prejudice, but I don't like lashing out at one county that way myself. It strikes me as unfair, absent pretty compelling circumstances.
Personally, I think it's better. If you take seriously that counties are communities of interest (not something I generally subscribe to, but a lot of other people do, so for the sake of argument), you should prefer to split up one community of interest while preserving others rather than splitting up four different communities of interest since in the aggregate it harms fewer people. (This is why in my view it is generally better to split smaller communities than larger ones also.)