Expanded Stats

Why are the stats so limited. Why not have stats that reflect each classes strengths. Take recon for example. I would like to know more than just kills. How many assists,  how many kills were headshots, distance range counts. This is good for people that really like to see numbers, it adds a bit more enjoyment. Vehicle kills, close call heals (really good for support class), kills with vehicles and each one. Its gives a bit more pride in each class, and may help motivate those that aren't very good at FPS (like me) who can still get excited just seeing the numbers, they can feel somewhat accomplished. I love the game, just would like to see how my class progresses a bit more. There are challenges, but they dont get seen in the stats. Why have all the extra notifications on screen during gameplay when you dont see them in the end.