I really love the solo-ability of this game. I also from time to time like to team up with a friend and we do questing together.
In other games I have played, the party leader can see and set any quest any player has. This would allow us to cooperative play them. For characters that have already completed the quest the end bonus would be either very small or perhaps given only one.
To make this much more viable and enjoyable I would also like to have everyone in the party be able to see the quests NPC's for the selected party quest. Too many times I get accused of standing there and staring into empty space when I am working my way though quest dialog, I have also been at the point where I see my friend seemingly drugged out of his skull talking to the empty air as well.
These two small changes would significantly enhance to ability of small groups to play though and complete quests together.
Of the games I personally have played I would say that COH did the best job and WOW did ok at that very task.
Thank you
** Asus Crosshair VI Hero, Ryzen 1800x, 64GB DDR4 @ 3000, GTX 1080 ti, 4K Samsung 3d Display m.2 Sata 3 Boot Drive, m.2 x4 nvme Game Drive **