As others have said the club need to manage the handling of the no shows, or limit the amount of tickets sold off for corporate weekends(which some believe is happening) better before we extend another stand, get a handle on that and then move forward with the north stand. As for the fancy seats they are struggling to fill why not for some games offer to upgrade loyal blues for a small fee(it would be well worth it), at least they are making something extra and can sell the extra seat on... there are time constraints I know but the gamble to leave it until the last minute is not working at present. One season doing a better job of ridding the emptihad bollocks shouldn't be too much to ask before approving a stadium expansion.
One way which some wont like, is penalties for people missing too many games, unless they make an effort to either inform the club in good time to sell the seat for that game or do it themselves and inform the club(the club should allow it, it's not about the money after all its about the clubs image and the people who don't care about that better start caring because it does matter).
What penalties? Price increase on their season card the following season if they pick up too many penalty points, obviously some people don't value the price of one game enough, those who do will be the ones who make sure they sell the seat on... it could be a way to freeze the season card prices for those who do things right.