1. If you like, it may not be representative until 6 (league and CL) games into the season though.
2. I looked at them, and commented.
3. Colour code attack midfield and defence. That will help compare like with like. Add a few lines of comment on each graph, highlighting high and low acheivers.
Try to avoid subjective measures (e.g. goal 'faults'). If possible, use one data sheet, then point a variety of pivot tables at it, that allows the data to be much more easilily manipulated. It might be worth putting the data set up in a common format and see what others can come up with.
4. I did one on Liverpool's central midfield formations last season, the results and goals conceded in the league, CL and both, for a variety of partnerships.