They're just not financially able. It's WOW TBC Gold not because they can't afford it. This has turned into a money buy game that involves hands-on and spoon-feeding.
SOM will experience the same fate as classical due to minor changes. The "first step" isn't good enough. There are numerous minor changes that take a couple of minutes to implement and could yield large changes making the experience buy Burning Crusade Classic Gold unique. Simply put, blizzard has lost all sense of ambition. So, the OP post of dissatisfaction was made.