If I would have to choose one thing for Destiny 2, it would be to have a more immersive, open world experience. I feel like this would greatly benefit the game and also rather organicaly fill up some of the present lack of story content, if this world would be more populated with something else than just enemies. This would also help to make your ship an actual transportation method, instead of just a loading screen ;). Running around on the same relatively small maps is the thing which feels most outdated to me. Maybe it boils down to "add some more rpg to the mix" ^^. So, here's hoping that them dropping legacy console support is a possible step in that direction :).