I'm having far too many games where nearly the entire world around me collapses into Independents, often these civilisations aren't even at war or under much barbarian pressure, they just explode to a series of checks the AI is incapable of understanding. What's especially frustrating in combination with this is the extreme regularity that Civilisations respawn, which constantly ruins games. For example, I just tried playing Carthage again, conquered Italy, only to have the Romans respawn, DOWing me a large army barely a dozen turns after they Collapsed. But in general, the ease Civilisations collapse isn't fun, it's arbitrary and stupidly ruins gameplay and long-term planning. You can have a crucial resource-agreement, war-ally, or destination for a great merchant and suddenly POOF, it's gone (often to have a hostile respawn a short while later). This isn't just the Classical Era, every single game I've ever played in this recent build has the Vikings collapse before 1200, seemingly for no reason whatsoever, for them particularly they seem to collapse and respawn 3-5 times before 1700, it's ridiculous. This often happens to Russia as well. Basically, Collapse triggers need to be more stringent, as well as Respawn Conditions. Both happen so often in sequence they don't have any meaning, and only irritate the player.