From an administrative point of view, it would seem to make sense to adjust the boundary, however:

The area in question includes a business park, a retail park and a hotel, meaning loss of commercial rates revenue to Co. Laois, along with a loss of 4200 voters. Not surprising that Laois Co. Council objected.

Good stuff. JOSM is a far superior editor once you get used to it. Always a good idea to map areas you have local knowledge of, or another source of information for. Satellite imagery can be years old and obsolete.