Idea: Item slots for skills

After just browsing Grimtools I had an idea upon seeing many Mythical items lose the skill the original item had. What if we had like 2 slots just for using certain skills? Level 58 Will of Bysmiel has a skill that summons 3 temp pets for 25 seconds on a 40 second cooldown. Mythical Will of Bysmiel drops the skill in favor of letting you summon a second Familiar as well as reducing the cooldown on Conjure Primal Spirit as well as making it cost zero energy.