There is no flow. If you go in without a team then you have no control over that flow. The flow and engagements are dictated by the biggest fireteam in a lobby. People come from all directions for no reason. Spawns are scattered because teams are scattered. Objective game types force a particular pattern. Control is the zones and how to get them. Rift is the spark and it's path to the goal. Supremacy is the corpses of your enemies but people are staying together more frequently. Clash is too much of a mess.