Well it’s about time! This post on FlyerTalk contains the memo, which mentions that complimentary soft drinks, juices, tea, water, and coffee will return to all USAir flights. The change is also mentioned here.
I think this was the right decision. When they introduced this change, they were probably thinking that other airlines would follow, given that other airlines matched most of their other “enhancements.” Once they saw that other airlines weren’t following, not to mention the price of oil dropped, they had a hard time justifying it, and were truly at a disadvantage.