The conditions are already poor so it wouldn't make much difference, and they will then get priority in choosing a new seat.
at the moment the seating prices are the same wherever you sit in the stand, the Mainstand extreme wing has obstructed views so are slightly cheaper, I can see in all stands coming soon a ticketing policy where if you sit centraly you will have to pay more than say sitting on line with the penalty area, this in not the case at present, but FSG will surely bring this in as they do in American Football when you sit on the half way line, 25 yard line or quarter line or whatever it is