What if Blizzard didn't release TBC and WOW TBC Gold instead launched an expansion inspired by the foundations that were built in vanilla? There are foundations such as neutral pvp areas, battlegrounds and even a chatroom called "LocalDefense" (I was having trouble getting into it since I didn't know the exact title) factions, factions, and many more.
The expansion I'm picturing is a real-life battle between alliance and horde fighting over neutral zones in order to take control of azeroth. As a player who controls a zone, there are more quests and flight paths. While attacking a zone you will receive specific quests that help your faction get control of that area. Instead of fighting 10 raptors in order to reach maximum level, participate in the battle. When you gain the control of a region, you get new quests to try and maintain control, the zone will change depending on the faction who controls it. Horde is controlling it? Alliance is a small group with only two outposts. It has to be moved slowly. There is a buy Burning Crusade Classic Gold mix of world-wide pvp and NPC's fighting with players and NPC's. Ressource transportations secured to various zones and protecting them from the hostile faction.