Madden 2013 XP attribute ratings

Does anyone know of a source that might explain how the heck the XP attribute ratings affect the abilities of players in this game? There are some that are straightforward enough- speed, throw power, catch to name a few; but there are many that are a little too obscure for me and some-route running, ball carrier vision, play recognition- that should seemingly be covered under awareness.

A google search reveals lots of other people have the same question but no definitive answer. You guys know of any? I tried searching “madden” for the game room forum and not one thread came up which makes me think I did something wrong:smack: so sorry if there is a thread on this already.