V3 Playthrough yesterday -
Very well balanced now, imo. The AI is teching at an amazing speed, and it is impossible to hoard late game wonders like you used to be able to. I had Harun go straight to internet, picking up CN Tower and SOH, and Harald go the south half of the tech tree and steal Red Fort/Himiji/etc while I pushed to Satellites.
The no lux/lux trades with friends is annoying, but I simply refuse to trade them most of the time if they won't give me parity. Generally within 20 turns they come around and offer a more reasonable deal. Since gold is a complete non issue (I was pulling close to 700gpt by turn 300), I can wait for them to stop being dinks about.
AI's still swallow city states very quickly, so it makes it important to actually back up those pledges of protection. I like this mechanic. Borderline CS's between my empire and the AI's actually require me to go down there and physically put peacekeeping troops in the way of them capturing it

Good change. Like your CS allies? Better play the part of the world power you think you are. You probably can't win a diplo V anymore at any difficulty level, but that's a good thing as well, considering how much of a joke it was.
Combat is not trivial, and I lose units routinely now by underestimating the AI tactics/strength, but I assume that's due to the balance change on melee units and me still thinking "2 pikes vs my fortified pike? No sweat" when it's really not. Speaking of pikes, the early spearman --> pike ruin is completely insane now with pikes at Chivalry and me never once seeing the AI field a landshneckt. I still feel it's fairly balanced considering that Swordsmen are easy to field, but that's very iron dependent. If you get screwed on Iron, you are screwed on military for a long time. That's something that's not so cool. If you research Bronze working and don't see any or only see a 3 mine somewhere in your neck of the woods, you might as well plan on rushing Medieval and opening Commerce because you have literally no choice. Again, at least there is a solution, but it's somewhat inelegant and doesn't work for all strategies.
Sistine Chapel is very important, might be worth me changing my typical strategy of Education -> Printing Press to opening the Renaissance immediately to obtain Sistine. If you can get that, you can defend against 200+ tourism for a long time, it's pretty dicey if you can't. AI's are no slouch in culture now, it requires a solid bit of effort to start overcoming their massive empires with the increased culture yield from buildings. I haven't tried to win a CV yet, it's on my list of things to do.
Space race feels pretty slow now, Beakers (and by extension GS's) just don't come like they used to. At certain points it's impossible to stop from generating GE's late in the game now, so a very high faith output is important to make up the difference. Thankfully, very high faith doesn't seem to be a problem. I think the race to Satellites is slower, but after Satellites still feels about the same, which is probably a good thing. You really don't wanna be waiting around after Apollo is done with nothing to do anyway, so lengthening that portion of the game isn't ideal.
All in all, very pleased with the mod. I've also built Angor Wat every game, and I don't remember the last time I bothered with that. Good change making that thing useful again!