Strictly my opinion. But I like the way the way the game engine is heading. Also keep in mind, I really haven't liked previous versions of Maddens for about the last 3 or 4 years, and was a big 2k fan.
I love the run game. Especially inside. Best running game in a football video game, not made by 2k. Passiig game is very good also, although with every game I have ever played, corner routes sometimes are too easy. I love the fact that QB's will actually miss their targets. . I love the graphics, animations and stadiums. (Yes I am becoming a graphics whore in my old age). I like the fact, that unlike the current gen versions, I get the feeling that ratings actually matter. I can really tell the subtle differences in the different players. Speed is no longer the only rating that matters. Just a lot of little subtle things in the gameplay.
So take my opinion with a grain of salt, I really haven't been a big fan of current gen Madden for a few years, there are a lot more features implemented in the current gen game, franchise mode is much less problematic in the current gen versions. With all that being said, on the field, I much, much prefer the Next Gen version. There is no going back for me.