In addition to the gang tackling you speak of, they also need to improve collisions during catches. As happened to probably many of you too, there was a deep pass thrown by the CPU, and my safety hit the WR right after the ball passed him. However, since I used an animation to hit the WR, the WR started to act as if he was already hit BEFORE I even touched him. So, I got called for DEF PI. This should never happen. You're right about 1 vs. 1 collisions. All you have to do in M11 is break 2 tackles and you're guaranteed at least 10 yards. Defenders can't intervene, so having 1 tackler is the same as having 3 tackles, since the other 2 tacklers will just fall down. This is the biggest issue in the game play of madden.