Capcom recently published an internal interview with Mega Man 11 producer Kazuhiro Tsuchiya. There, they talked about the game. About halfway into the interview, they discussed the team that developed the game. Tsuchiya revealed that “around 40 people” were involved in development for the game, which is “a rather small number compared to recently development teams”.
As for why, Tsuchiya explained that “There are certainly benefits to a larger development team, but with so many people it means that some are unable to affect development across the game as a whole. With around 30 people it feels like you’ve got just enough staff for the project. It’s very clear what aspects of the game each person is in charge of, so they can be completely sure of their goals and keenly feel responsibility towards them. I feel like the development team was the perfect size for a project of this sort”.