Hi I applied citizenship as family. My wife received RQ and we sent the required proofs. No action for the last three months. I am right now outside Canada. I like to separate the application and asked the call center. They asked to send a letter to immigration office stating a reason why we want to separate the application. What could be the ideal reason. My actual reason is the delay in processing of my wife application delays mine. Is it a valid reason?

Thanks for any suggestion

Sundar