Yeah, I noted the same:
"The Proposed Development comprises the erection of a ‘Fan Zone’ which will be a partially open sided structure with polycarbonate/glazed elevations and roof. Internally there will be areas of seating, food and drink facilities, toilets, a mezzanine members area, TV and...
Anecdotally, it feels like Dick's fills up early and quickly becomes one-in-one-out on match days and if this place is any good at all - and I'm sure it will be - I don't see why the same wouldn't happen.
In that image the black line is the shadow of the stadium, not the stadium itself.
It does look great, but I just can't see it can be that big, given the available area and, as you say, the need to allow space for fans to pass through, particularly post-match.