I added these three 2015 Razzies to the top of the Wiki:
Southwest Airlines effective April 17, 2015: "the number of Rapid Rewards Points needed to redeem for certain flights will vary based on destination, time, day of travel, demand, fare class, and other factors." This
extraordinarily vague announcement leaves members, at least for now, with no idea what their points will be worth. It also opens the door to unlimited changes in the value of points with no notice.
Delta Airlines has
eliminated its published award chart without warning, presumably in order to allow award pricing to be better fine tuned. This also opens the door to unlimited changes in the value of miles with no notice.
British Airways effective April 28, 2015 makes
many changes to Avios. Redemption levels increase for most premium cabin travel. Most coach awards stay about the same. One benefit is an ample number of off-peak dates for redemption at lower levels in each class. Upgrade using Avios pricing increases dramatically. Tier status will be harder to earn.
'Tis the season to be grumpy about devaluations. If I have overlooked any important adverse changes to any programs from March 2014 through January 2015, please add them to the Wiki and post them here.