I think it is time to remove Hit and Expertise requirements from the Game. Blizzard often stresses the importance of making the game feel fun, which I strongly agree with and this change will do just that. Having to tweak your hit/expertise is boring and takes away from the more fun stats like crit, haste and mastery. I still believe there should be a small chance for a mob to dodge, parry or be missed by your spell, but this chance should scale automatically depending on the level difference between you and the npc.
I have spoken to quite a number of people in-game about this and most tend to agree that hit/expertise requirements are an unnecessary feature, considering the way the game has evolved over the years.
Edit: This suggestion is NOT about making the game easier, it is about making it MORE FUN.