To be fair to what you are seeing, I do still see pulling guards have brain farts, especially if I don't stay behind them. It's really easy to overrun pullers on plays like Power and completely screw everything up.
Honestly, I think the biggest thing that has helped the OL moreso than any AI changes is just the fact that everyone on the field has slowed down, so there's less pressure to just sprint out in front of a play past your blockers. I find that having patience as a runner, particularly with the sprint button, helps me on gap-running plays. Which, I realize that that's something people has said about Madden for years, but I think it's actually true now?
Hopefully Tiburon continues to work on blocker targeting going forward because I think there's still work to be done here.