I wouldn't actually mind if they kept the game the same, with a new story. Although, the influence system needs to be tweaked i.e. one you make a LS player DS they should stop complaining about you killing for the sake of it (handmaiden, huge offender) and next gen gfx, no loading or saving times.
Indeed. I do not believe that the game needs to be changed drasticly to be successful. INfact that may be its downfall. It needs a strong story, tweeks to the combat and influence system, maybe add a few extra features and make it look more pretty.
Nothing major needs changing, unless they have a really good idea that they want to implament... if thats the case yay!