Patrol fireteam max size should be increased to 6.
Want to do court of Oryx or Archon's forge, ensuring you have the best chance of victory by having the most players? Well, too bad. You can only have 3 people in your fireteam, if you want any more you need to run into someone at random (okay chance at CoO, horrible chance at AF).
I think the maximum size for patrol fireteams should be increased to 6 so we can easily get the people we need for activities like this.
[b]EDIT:[/b] Actually, why not increase it to 12 to maximise fun factor? The more the merrier!
6-man fireteams should be available for every PvE activity. For those who say it would be too easy, then how about more enemies spawn and are stronger? I don't expect that to change in this game but at the very least I hope that in Destiny 2 I can finally play in a 4-player fireteam with my friends. It sucks that one of us has to sit out because of such a random and awkward co-op limit.