PatternReview.com to the rescue!

I posted my problem with the NL6735 on one of the Pattern Review.com message boards and got a great suggestion: this Burda Style magazine dress (01-2009-106):

I like the semi-flounced sleeve - some fullness, but not overwhelmingly so.  It looks like it has three two pieces, but one of the reviewers who made it did a version with four pieces, which is what I think I'm going to try. I think it's a perfect solution to my problem of not having enough fabric.

Now if I only had enough *time* to draft & sew the sleeve!