2. The characters move very fast so some people might be confused. Auto aim could be a nice option.
If Legions ever goes to console, you might need an auto aim to make up for the flaws in the hardware.
Man the *dance* up is all I can honestly say. Your in a whole new ball game here, everything your used to is now different. You need to adapt, its fast, furious, unforgiving and brutal. Thus, you must become fast and furious to stay alive, unforgiving to those who come at you, and brutal to those who make a mistake and give you the upper hand.
EDIT: On a side note, point three is good, though I would agree on the T2/T:V pinging sound when you hit a target. The current flash of red doesn't cut it for me.