I don't even know how to reply to this, you couldn't be more wrong. How do you kite mobs that instantly leash while you have the clunkiest casting/movement system to ever exist in a MMO? Have you ever tried actually kiting? It's not possible, at all.
I'm also not exactly sure how you think this system can "be more challenging", you don't manage your MP, CDs, hate, positioning, ANYTHING. You mindless spam -ga'd heals/buffs and randomly nuke without a care in the world.