The patch is far from perfect, I played this morning and I noticed several major issues.
1. The playbooks, yes you have to resave them (under a new name, btw), but CHECK your playbooks. My custom playbooks were drastically different and I was unable to make all the changes necessary to get them back to where they were (encountered a minimum play error in my run oriented playbook). Some formations were added with 1 play only in them and I could not remove them. Additionally, a lot of the formation names have changed and sum are redundant. For example there is a BYU split twins formation and a regular split twins formation, which are the same formations. There's also a tiger 5 WR formation and a 5 WR receiver formation with the exact same plays. I ended up starting my playbooks over from scratch.
2. I noticed a severe defensive glitch on a power option play. There was a LB who was in a zone that 'slid' to the sideline and sat there in a ready stance as my RB ran right around him. The defensive player was still in the same stance as I crossed then endzone 70 yards away.
3. No huddle offense is totally botched. When I went to hurry up it put me in a standard shotgun formation no matter what I used previously, could only select my standard shotgun formation plays (3 WR, TE, HB). Big issue here.
4. Are the player tendencies going to be fixed in the online dynasty, how will the roster update affect those?
The good:
1. Linebackers/short zone players do react to the run better. Running is a little more difficult now.
2. I noticed far less passes are getting batted down by super LBs/DLmen.
2b. maybe it was just me, but I also completed a couple passes against DBs in 1/1 coverage that was very tight. They weren't able to run at a full sprint then turn around and jump 40" in the air to swat a ball in one move. Granted it was a risky throw, I got lucky, but it was entertaining to watch.
3. The CPU seemed to do a little better job of using the game clock. More than once they took the playclock down to about 5 seconds. It wasn't the norm (wasn't excessive), but at least it kept me from teeing off on the CPU.
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The things I wish they would fix:
When playing the CPU, how apparent it is when they know the exact play you're running and line up to defend it. For example: I could be passing the ball all day long from the I formation, the moment I call a run inside or a full back dive, the CPU will pinch their DL and bring their safeties in. I audible and the CPU will back off into coverage. That is rather gay. I know that's how the game is programmed, but at least disguise it a little. When playing as a spread offense the coverages are even more obvious.