Yes, there's going to be a range of reactions to that, from "oh yes, sure, be my guest" through to "I booked this seat months ago, why should I be mucked about by you?". And most people, most of the time, would be somewhere in between. So given you were later to book / get status I'd simply work out more clearly your hierarchy of needs. If it's for the greater space of row 1, then the trade off is not seating together. Should this be a trip to BRU then it wouldn't really matter I would suggest, IST would be different. If that's not acceptable then you're going to be further back but sat together. But we don't know much about this flight - it's possible the other passengers would move or change flights, it's possible the curtain will go down to the first exit row. Either way, the Gold line is most unlikely to be able to help, from the information provided.