Maybe we could rotate them twice per day, giving each
FA 12 hours on the
main page. Then we wouldn't be increasing the amount of clutter there. The
first screenful is the most important thing, many readers will never
scroll down when they visit that page.
That would result in people that only check the front page once a day
(which is probably a very large number of people) missing half the
featured articles. It would be roughly equivalent to having the
featured article chosen at random from two options a day each time the
page is loaded. I think that would detract from the concept a daily
FA.