They lost quite a few from the A330 the last couple of years. The T & Cs have deteriorated, no thanks to many newcomers who abused the privileges accorded to the expats.
I heard that now even if your privilege travel seats are confirmed you can expect to be bumped off anytime without warning. If a Korean pax, unconfirmed and coming in at the very last minute shows up, your confirmed seat is at risk. KAL ground staff officers and managers can easily take away your seats at their whims and fancies.
I am sure many more are looking to jump ship. Once the Chinese airlines, and Turkish improve on their commuting arrangements, the flood gates will open.