Exactly how I understand it as well. Blocking AI has been redone, but the interactions will be the same. However, the new addition of 'play-by-play' fatigue will probably have an effect on OL/DL interactions as players will now give up on plays if they are too tired.
That being said, the Infinity Engine 2.0 does not affect OL/DL interactions. It's been improved from Madden 13 to include footplanting and limbs, but I wouldn't expect physics-based blocking until next-gen.