Im based at a tiny airport so fly DL and UA about 50/50 because of limited flight options. Of all the things UA can learn from DL, dynamic based award program is literally the one thing that that is not a positive change. SkyPesos are garbage, never been able to fin anything leaving here under 40,000 SkyPesos r/t. Any international trip, even economy is hard to find under 100,000, DeltaOne will often run 300,000+ r/t. DL will run flash sales, usually somewhere with a weeks notice leaving on a Wednesday morning that makes it almost impossible for the average person to take advantage of. We'll see how it plays out obviously, but getting MP miles was the only advantage UA has over DL in any regard for my situation