The NAS 1097 "Oops" rivets are great for fixing the occasional screw up when you can't redimple the hole for a larger size rivet. This happens when you are riveting the skins on, drill out a bad rivet and mess up the hole. Joints made with these rivets aren't as strong in tension as ones made with normal rivets, due to the fact that the outer diameter of the flush head is not that much bigger than the diameter of the body. So, you will have a weaker structure if you use several of them in a row.
In the case in question, you can easily dimple the skins and ribs for 1/8 rivets, so this is the preferred repair, from a structural strength perspective.