With the constant "reroll locust" that exists in WoW (those people, like you, who can't do the grind to 70 any more and quit early, but simply can't quit WoW entirely), Blizzard would make a killing and at the same time deal with an issue annoying to other players.

However, they will not even begin to consider this due to their stubborn attitudes. As a matter of fact, the most prudent concept of merging low population servers in order to fix the real plague that hurts Blizzard, dead empty wastes of realms, isn't even really on the table. They sure won't make new servers to do this.