When I started to play VP I expected that some civs excell only at something, so I was very shocked that a runaway civs was good at everything, but this is the VP way. You cannot neglect any aspect of the game if you want to succeed, it doesn't really matter what victory condition you are after. I like more the 'specialist civ' paradigm (if fact, I was advocating for a science civ to be good just at science), but I'm getting used to this one. It's a community project, so I have to live with the likings of many people.
That being said, in the last months gameplay has drastically changed. I don't know if you were playing VP when science from pop was removed, when every % city bonus building was removed, and policies were set as requirements for wonders. Skirmishers units were added. Naval warfare was changed with ranged Classical ships. Swords units got better at city taking. After a long time of adaptation, science was tuned so it researched very fast near the end game and some top tech units could be seen at war. Corporations got a new face. Great Musicians actions were balanced so some Great works are desirable before doing concerts. Then AI was improving more and more, pathfinders changing here and there. A few versions back, AI was so peaceful that preemptive action was needed in order to defeat it, because a peaceful AI is frightening. Now, warmonger AI isn't terrifying, but certainly plays like an average player with some bonuses. And the last version bringed back aggressive AI, a new naval tactical AI, capable of conquering cities just with navies, and challenging barbarians. City defenses have been lowered, then raised, then lowered and now raised a lot more, so now you can easily take a city without walls, but it is quite difficult when it has defenses.
I had to move back to Prince, I that have been playing and adapting to every new change. You come back after several months and the game has evolved more than you can imagine. You are free to dislike the changes, but most of them were driven by players, while only the most radical ones were Gazebo's ideas (like removing science from pop).
EDIT: As a result of AI playing more aggressively, players are reporting easier games. Some still think that AI should try to do whatever makes it win, so the game is more difficult. I believe that in current release every AI is trying to win, even against other AIs, so if nobody attacked Korea this could have been for fear, for considering (incorrectly) that objetive not worthy, or for some oversight in its thinking process. In Europa Universalis IV there is a nice Alliance feature that makes many countries rally around a longtime rival of one country, so when that country gets many haters, a full alliance is ready to fight against it. It makes a full domination, non-stop conquests, game not viable.