In betrayal, the foundations of her home crumbled anyway - only it wasn't Cloudsdale, but Ponyville. And Cloudsdale would had fallen apart anyway sooner or later once Discord amps up his Chaos across Equestria.
Then again, considering the unwinnable position Discord created for her, no one would had done it better in RD's place.
This is absolutely fantastic. I love the angle and gloomy atmosphere in this picture. Dashie's eyes look so lifeless and I really love how you draw her mane, with lots of hair! And how it looks strangely. And lastly the wings look very feathery and soft. I really love your art style. Keep up the great work!