This should help you out.
https://www.easports.com/madden-nfl/...fl-15-features
http://help.ea.com/en/article/madden...game-features/
Last year they started something called continous development and patches/gameplay improvements came out till around April
P.S. Ah, you edited after I posted this.
Opinions will vary across the board, but I can tell you, from a majority of OS posters(and some would disagree) POV, Madden 16 was the best playing Madden and CFM was lacking. Just look around for the recent CFM threads.