The county was manually added to some trunk tower sites (I only ever saw it on Michigan's MPSCS and nowhere else). Hard to justify benefit for re-adding them back in, when:
1. The tower sites have lat/long info which will let you figure out what sites to monitor - you don't need the county in the site text field.
2. If the county name is at the end of the site text field, you can't sort on it. Where it is now, in a separate field, you can do a sort, if you have a reason to do a sort.
3. It adds unnecessary length to the site text field, which some scanners won't be able to handle.
4. You can add the county text to the site text field yourself if you wish.
In order to get county names put back in, you need to make a database submission, not go after Uniden. They're only displaying what the RRDB has to offer. But frankly, I prefer it this way, and I think you will find most people do too. This allows the site to be listed in the county it "belongs" to, not to mention the already-existing geotagging making it relevant to the location it serves.