I suggested, since Destiny 1, that there should be an LFG kiosk at the tower. A drop down menu whereby you indicate the activity, number of people required etc and players can select which games they want to join. Then, once accepted, you are on that person's fireteam from the tower and go into orbit with the required fireteam. Whilst waiting for the LFG group to fill, the fireteam members already joined could be cashing their engrams, sorting their loadout / taking what you need out of your vault space etc. before you head into orbit and the activity. The tech is all there, just needs the will and a bit of tweaking.