Create rifts like Diablo (all factions) the more you push the better the rewards...i.e.....
- Higher rolled gear
- Higher quantity of parts needed for optimization
- Rare apparel
- Rare exotics not seen in normal gameplay
- Rare named items not seen in normal gameplay
- New weapons not seen in normal gameplay
- New weapon mods not seen in normal gameplay
Basically the further you get the more chance for the above to drop.
Fun Fun Fun.....preferably in open world not inside something like the summit.....Oh and checkpoints so you can carry on where you left off so you can carry on at a later date without losing progress.