GTAV seems like a good example of how a very large number of developers in different teams around the world can collaborate effectively.
The problem with a lot of recent Ubisoft games is they all seem to be built based on an internal design handbook rather than someone's creative vision. All of their open world games follow the exact same formula: a main storyline surrounded by smaller, repetitive "activities," such as gathering resources of some kind, collectathons, etc. Unlike games like The Witcher 3 or GTAV, there's very little variety outside of the main missions. Essentially they vastly improved AC2 over the first game and now use that exact same formula for every game they make.