Well with this Destiny 2 would start off pretty shitty since the main focus is basically keeping PvE the same and trying to improve PvP. Destiny 2 needs to focus on PvE, HEAVILY. If PvE can deliver all around good mechanics and more things, then it'll be easier to do PvP things. Such as space battles, better vehicles in general. As for game modes I think a bigger PvP lobby, such as a 20vs20 would be a start. Destiny has a good stage to do unique things, could be as fast as Titanfall and as destructive is Battlefield if it wants to be. We don't need more CoD like games. Gun Master would have my vote though, a set of 20 guns with set perks for the match. First to get 3 kills with all the weapons wins.