As of now, I intend to keep CO as my primary carrier next year and see how things shake out in the rest of the industry. The change that affects me the most is the reduction in Plat bonus miles to 100%, but CO was the last of the legacies to offer a 125% RDM bonus to its top tier elites. I hope CO will offer some other benefit to Plats to offset the reduction in RDM bonus, but I am not holding my breath.