I agree with Linkurrra epic 2 hr movies are acceptable I am quite partial to Gladiator with Russell Crowe. But even though a 2hr ability can fit into the scheme I don't think it should be the rule. As we all know from FFXI some 2hr abilities are quite lacking so instead of having them for every class they go case by case basis. Plus there are other limitations they can tag on instead of extended timer for very strong abilities. Like pre reqs where you must be at this % of HP or MP or the enemy is at % HP. There are also the extra payment for abilities such as along with TP you pay MP or HP but to go even further with statistical debuffs beyond just stances. All can be used for balancing purposes instead of just timers.