The 5k change fee gets charged when the new ticket is reissued. You can make multiple changes and only get charged once for the reissue. For some flights at almost a year out, the queue is supposedly based on time and urgency so waiting a number of months is not uncommon. You don't get to choose when this occurs, though.
I've had an agent proactively expedite the reissue (for QF flights), which was unfortunate given I also needed to add flights from other carriers at some point after that.
I've had an agent proactively expedite the reissue (for QF flights), which was unfortunate given I also needed to add flights from other carriers at some point after that.

