Ilvl sync for such trials should alow only +10ilvl above the ilvl requirement of duty. That would make every trial more enjoyable but it would also bring many problems. 1st it will be weird that a hero, who has killed so many enemies has problem killing a primal he bested x years ago. Also many people would stop doing the trials and newbies will have even longer queues and bad players won't be able to hide behind their gear.