No. This adds club seating, improves restroom facilities, and vending. Capacity drops about 1,000 to 1,500.
I believe that when capacity went up 10-years ago, it actually went down. They don't report actual attendance. If they are within about 1000 of capacity it was always the same #. The Des Moines Register uncovered their actual attendance #s before and after the last capacity increase, and actual attendance was consistently lower than it had been before the increase in capacity from 70,397 to 70,585.
Usually there are single seats scattered throughout a football stadium that are unsold, and/or unfilled. seats, even for "sell-outs" at every stadium.