If you're making them in sequence, not simultaneously, it's a good idea to bring Sleeve #1 along for frequent comparison. It's not much bigger than a sock, and you want them to match, riiiight? Periods of forced concentration (aka long airplane rides) enabled me to crank along to the last repeat of the leaf pattern. I'm home now, but so close to being done that motivation is not a problem. (Update: I am done!)
So after the sleeves are done and sewn on, the remaining challenge is the cardigan edging. I'm not an enormous fan of the plain blue edge of the cropped cardigan version. In fact, there are a whole bunch of different takes on this sweater as a cardigan. Take a look on Ravelry and see what I mean.
And then finish the whole thing off with nordic clasps. What do you think?