Adding jumping does not turn every MMORPG into a "platformer." A "platformer" game is more about movement and dodging pitfalls than about defeating enemies, going on quests, socalizing, and crafting. In a platformer game, its usually your specific goal to get from point A to point B without falling in pits or touching an enemy. Adding the ability to jump off the ground does not suddenly turn an MMO into one of those games.