The official tongue weight limit for the 5th generation Legacy and Outback is 200# for both 3.6R and 2.5i North America models. At this weight, noticed between 1" and 2" in sag (about), probably closer to 2". Outback owners (5th generation) have had similar complaints from what I've read on the Outback forums. Legacy and Outback are essentially different trim levels of the same vehicles, as indicated by the same owner's manual covering both vehicles.
As an aside, very impressed that this thread has reached 146 pages.