When you play without the crosshair, you'll have archery a new challenge, too. It was definitely a learning curve for me. I almost turned the thing back on when I realized that without the crosshair, I couldn't shoot for beans. Now, I'm a lot better than I was. I still have to aim carefully (especially from stealth), but I'm a lot faster at it.
Miss it once, shame on you!, Miss it twice, shame on you again. Miss it thrice. Well the shame is no longer bearable, cause you are a fool to not have known.
I have yet to play Legendary. I know I am going to die though. I do nuff damage on master, but I thinkest I am not ready for the pain and glory. One thing, aim high if you keep missing without the crosshair. And use spells to keep alive. Atm the I could care less about RP if I am playing on the highest difficulty. Seems more like a novice thing to me. Plus you level faster when you use all your skills in battle.