Domestic programs are changing
The biggest change UA and AA are going through is that historically, the award/upgrade availability were based on the ability to sell premium seats while now, the premium cabins are being used as a carrot/reward for high fare buyers in coach. Since most of the latter happens in the last few weeks, the pressure is to leave as many seats as possible open for such purposes.
The consequences of this revenue management is that a lot more seats will be held open for "revenue" (not premium revenue but extortion fare coach revenue that has set an expectation of upgrades into premium cabins) until much closer to date of flight affecting both awards and upgrades.
UA, for example, currently makes a fixed number of domestic seats available for upgrade for awards/upgrades on its 757s and above but not on most 737s and Airbus flights. Once those seats are gone, it will not release any more seats until a couple of days before the flight at the most even to the point of not releasing it at 100 hour window on many flights (not sure whether they are considering the fare basis at this point to decide whether to release seats to upgrade someone waiting at that window).
Since International has no such pressures, I don't expect a change from the previous policy at least for now.