You may also be eligible for complimentary upgrades and special rates at select hotels, resorts, and spas. (mybanktracker.com)
They've compromised somewhat on this between the two systems, taking the current AAdvantage domestic upgrade process, with unlimited complimentary upgrades on short flights. (viewfromthewing.boardingarea.com)
One key difference is that all elites will get unlimited complimentary upgrades for flights under 500 miles. (travelcodex.com)