Using diversion also cost you one role action slot. You have to choose do you wanna use lucid for mana, swiftcast for mobility or instaraise, addle for aoe mitigation or dps, apoc for tank busters, manashift for healers or bard foe, surecast preventing kncokbacks etc. You dont really wanna use diversion and sacrifice one of these skills if it is not 100% demanded.