Nowadays developers love to change the masterplan without inform buyers. Buyers would be the last one to know the changes, pretty fair to buyers since this never wil be stated officially in our S&P.
Just like the recent incidents where Pangaea Cyberjaya masterplan has been changed from office blocks+shopping mall to Street mall and New residentials. Buyers should complain to developer and get compensation,  or giving a choice to cancel the purchase (If possible).