I haven't noticed any game-breaking errors in coverage logic, but I will be the first one to tell you that I am not a huge labber or game tester. I play and make adjustments by induction as I go. This was far easier than trying to actually memorize all the rules plus exceptions and bugs.
One thing that was done this year was that the deep half zones in the Cover 6/Cover 9 plays no longer have any match principles so crossers and posts can be an issue.
Last year you could play the crosser/post until he could be passed off to those zones and then you would attack check downs like drags. This year if you want to stop the crosser you must concede the drag and rely on sure tackling to minimize the gain.
Like the guy above me said your deep safety can also have some problems in Palms when #1 and #2 switch. Since most of my usage of Palms comes vs. Trips this isn't a big issue for me as neither humans nor CPU favor concepts that exploit it. The next time someone calls Flood Switch against me will be the first.
If you are like me and want no part of base align (EA if you are reading this every single corny defensive tactic in this game is enabled by base aligning - take it out!) you can get the safety to play the vertical better by manually moving him.
From default alignment I'd be pretty pissed if a safety could get to an outside vertical from a receiver aligned to the field, anyway. That's too much ground for anyone to cover especially if you don't get a successful jam on the #1.