From personal experience, I think that its better to work with people who you don’t personally know but knowledgeable in the role they’re playing on a project. For Capstone I and II, I worked with people whom I’ve never met from previous classes but they were knowledgeable of the things that they’re supposed to do. The team dynamics were somewhat rough at the beginning mainly due to not knowing each one prior but it all worked out well because we had the right person for the role. If there were misunderstandings or hard feelings it wasn’t taken personally which was great. Lastly, working with people I didn’t know prior gave room for making new friends.