I am late in posting, but I finished my Ravelympic sweater last week, in time to medal in Cable Cross-Country and Sweaterboard Cross.
Modifications: I carried the cable all the way down the piece after the fronts joined. I just continued with the cable pattern rows on those 25 stitches, adding 2 purl stitches just before the cable panel to balance the pattern. I also lengthened the body ribbing by about 2-3 inches. I worked the collar before the sleeves, and adjusted the sleeve length to be just a bit longer.
I'm quite happy with how it turned out. Most of my sweaters to date have not lived up to my hopes for them - this one did!