Agreed: the result announced here is not something to get excited about.
However, the important part of this is that this experimental method promises to be able to produce a much better measurement of the neutron skin than previous methods. THAT is the point, and regardless of what that result proves to be, it will be a very important piece of information to know. The exciting thing here is the “proof of principle” that this experimental method is viable.
This data is important enough that if this team is unable to use this specific apparatus to produce sufficient accuracy, certainly there will be a drive to build a follow-on apparatus with sufficient stability to accomplish the task.
Yes, I see what you mean there. The method is more important than these results, but of course science reporters go with the more spectacular headline :)