My experience is only based on two games since the patch, but I'd say definitely the AI is - more unpredictable.
- and therefore can be more dangerous.
1. In both games, I've had 1 - 2 AI Civs that got mad at me in Antiquity and stayed mad until the bitter end of the Modern Age. I suspect this is because the initial conditions that started them getting angry did not change that much throughout the game (I still held some of their cities from the initial conflict with them and we were sharing borders, so the 'settled too close' figured in)
2. In both games, I've had the AI show better Diplomatic maneuvering - declarations of war tend to be answered by Alliances so that I am almost always fighting at least two Civs at once, and many of those Alliances were 'negotiated' or initiated After the declaration of war.
3. The AI Civs are aggressively going after Wonders: I now expect to have to really concentrate to get as many as I want for any Legacy or just their Bonuses, and can expect to miss out on at least 20 to 33% of the ones I try for.
4. As posted, the Distant Lands Civs are filling up their continent much more than they used to: Treasure Ship resources and locations that have them are much harder to find and exploit without having to take them away from someone else first.
5. The AI does not seem to be Forward Settling quite as much, but as stated, this is from only two games, so might just be Luck of the Map. On the other hand, they are building solidly contiguous 'states' by the beginning of Exploration with only their new Exploration Island cities being separate from the 'homeland'. The other side of this is that they are very slow to put cities on the Distant Lands continent/mainland, in one game not building any until the Modern Age.
6. One thing that has not changed, though: the AI is still a tactical Idiot. Enemy units still come forward in ones and twos, they build far more units than they have Commanders for (and rarely build more than 1 Fleet Commander in Exploration at all) so that even when they have a large force they have trouble moving into position to strike or defend. - And, of course, this also means that they lose a large part of their army/fleet when the Age changes, because they don't have enough Commanders to maintain their unit count.
If you have the extra Settlement Limit, beginning of Exploration or beginning of Modern Age are still two good times to go to war with an annoying neighbor: even allied, two AI Civs will not have the combined forces larger than what one well-prepared Human player can mass early in the Age from the carry over from the previous Age.
So, definitely not up to even dull human standard, but at times almost worthy opposition. A few more patches and the AI might be good enough to give a beginning Human player a real challenge - but the AI still shows no sign of being able to plan ahead, as in preparing for the Age change or building armies with both enough Units (they've largely got that part now) and enough Commanders for those Units to be able to move, mass, and use them adequately.