You never know when the bloom may be off the P/C rose. Ice dance judges are notoriously fickle.Maybe this would be the best time for the Shibs to retire. They just had their great Olympics and achieved their lifelong dream of making the podium (twice!) and, with P/C likely staying in, it's highly doubtful they would ever beat them. They are both intelligent people in their twenties with college educations and they have endeared themselves to America... maybe it's the perfect time to move on to the next chapter of their lives.
Obviously, they will do what they want to do. Just sayin'...