Yikes, 6 weeks is indeed absurd. I currently have a mileage ticket in economy for travel in about 3 weeks. Business class fares and dropped and I want to cancel the mileage ticket, book and pay for business and use the miles to offset the cost. The phone agent, after explaining 3 times what I want to do, said I have to cancel, redeposit and pay the fee to be able to tell how long the redeposit will take. My miles expire in December, so I need to use them. I don't think I want to risk this archaic return process to possibly not be able to use my miles and book the business class ticket. Unless there's a mySQ upgrade offer, we'll have to just deal with economy class and hope the middle seat can be blocked.
Any advice?