If it was a sloped shoulder, you use short rows to shape the shoulder before using 3nbo. I'd use mattress stitch if they're bound off and you don't want to take them out. I agree that picking up and then binding off might look funny--but it's easy to take out if you try it and don't like it.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry