If anything, thanks to what's happened with fuel prices, the cost of flying passengers has decreased since the last major award chart changes in 2012. (travelingformiles.com)
These programs haven't had major Award / Reward chart changes in quite a while, and I wouldn't be surprised to see some kind of a change over the next year. (travelcodex.com)
The fact that they make award chart changes effective immediately without prior notice is great. (viewfromthewing.boardingarea.com)