The other end of that problem was the Mareitanian pegasi, who weren't integrating into Equestrian society. Admittedly some of them had barely been in the country for more than three months, and Celestia certainly wasn't expecting instant results, but they weren't even trying to integrate into Cloudsdale where the population was almost exclusively pegasi. Being reluctant to mix with unicorns, and especially earth ponies, was something Celestia could understand, but other pegasi? Not so much.