Bar the amount of seats, it's their location, right at the front of the stand. It will impact on the support behind those seats. Fans sitting behind the proposed hospitality seats will probably want to watch the match, as the seats will be priced accordingly, as they are also at the front of the stand, but behind the hospitality seats, and because of the price of those seats. Those seats also include a proposed row of Ambulant seating. There won't be anyone standing and singing behind the hospitality section or further back in the tier.
We are going round in circles, of course.
All depends on you viewing all 640 people as exactly the same person/type, that doesn't sing, doesn't care, doesn't add to the atmosphere. Just because they have paid a little bit more (if that happens to be the case) for a seat in a good location with quicker access to a bar (but the same bogs as the rest of the stand).
I just can't see crowd dymamics so singularly, sorry. I imagine there will be loud cunts in those seats, just as there will be silent cunts, tourists, and early leavers all throughout the stand. So for that, I just can't come to agree with you, or worry about it at this point.