I've got a LOT of those on my Nugget bines, as well. I wasn't sure as to whether they were good enough, but figured since they have what appears to be the "normal" amount of lupulin in them, i'd use them. I did, however, cut off the extraneous leaves in order to not throw off the weight ration (alpha acid percentage), but on only a few cones, it shouldn't matter.
I noticed i got most of my leafy cones at the end of the bine arms.