I'm also noticing that the ZOCs aren't quite as affected as they used to be.
I mean, I conquer all of the planets within 20 or so hexes, place Culture starbases along the border, study Influence techs out the wazoo and be #1 in tech across the galaxy...and all of that territory is still surrounded by the enemy's ZOC, which hasn't budged an inch.
I mean, I hate to say it, but the game is nigh unplayable at this point.