I think increasing scoring would take something away from football (soccer) rather than add to it, but it will be interesting to hear how exactly people think the rules should be changed.
FIFA should experiment with every refereeing decision possible being able to be analysed/scrutinized/affirmed by a Television Match Official (similar to rugby) and then scale back as necessary.
FIFA don't have the wisdom or foresight to do this, sadly. It's badly needed to stamp out cheating, diving, off-the-ball fouls not spotted by the ref, Thierry Henry handball-type incidents, incorrect disallowed goal incidents etc.
EDIT: They (FIFA) did try to increase the likelihood of goals being scored in this World Cup and the last World Cup also, by messing with the ball design, making it's flight path unpredictable and therefore more difficult for keepers to save a shot at goal.
And then it wouldn't be Football anymore...