Not too sure to be honest, I just got told when I went for a chat with the commercial team last year when we sorted our sponsorship out that Acun wants a row of boxes in the East Stand and when I asked if that was part of the expansion plans I was told that they were looking at the costs of doing the boxes with and without the extra tier above them.
I'm going back there in a few days to confirm our sponsorship for next year so I'll try and see if there's any progress.
They want to expand in areas where people will get behind the team and not sit in silence. Though you can see why they would like more executive boxes.