Why when I'm running from mob to mob, do I care about being able to look at a water fall.
Why do I care how I turn.
The mouse was always there for things like that in FFXI.. But to 99% of thing other then look at the view. You didn't need the mouse.
Run up to mob, Lock on mob (Fix camera), Unlock mob (tap a key 2 times). Move left and right, in and out.
Key thing here is... one hand controlling Movement very very nicely in that I can press Left right and up and down, Camera control quick and easy on arrow keys with thumb.
2nd hand free for all actions.
It's supper hard to use Alt + key or Control + key when one hand is hovering over 1/2 the keyboard.
I don't know how many times I've missed moving out of AOE because I was looking at where my mouse was pointing well trying to move.
As for the comment on more sensitive control.
Please point out one point when this matter outside of looking at scenery.
Post beta 3 your POS is a single point at the center of your character, and there is never a time when your feet need to be positioned perfectly.