Obviously the score at full time is a pretty important statistic but I think that on the pitch, if something is not apparent without looking at the figures, there are more important things to attend to. Thing's like KDB's pass completion rate don't need to be looked at from a statistical perspective as it's apparent to any impartial viewer that he plays too many sloppy passes which should be simple for such a brilliant natural player. But he also has a huge number of assists over the last two seasons and that would contrast massively with someone like Nasri who will have a higher pass completion rate but far fewer direct contributions to goals.
Losing my point here but I guess what I'm trying to say is that you can tell who the best players are from watching the game whereas, if someone handed you a sheet of numbers, you'd just be making an educated guess.