It may be unjustified as its not open yet BUT empty the terrace seems to protrude too far into main thoroughfare nr ticket office etc that basically it in the way foo=ill it with 3000 people and could be chaotic people coming going AND trying to pass, now add a Palace escort how is that going to work? Fans kettled in the Terrace?
If it is full with 3000 people it won't protrude any further, the building won't get any bigger.
Also the Palace escort goes round the back of the West stand so not sure how that will cause any issues.