1. Longer-lasting batteries. That 23min DJI says is nonsense in real life coz when your battery gets down to 20%, you already get the annoying alarm to land!
2.Waterproofing as standard or at least an option. Haft of my flying (or even more!) occur over a body of water and DJI knows that, so why not make it waterproof (or add some flotation device).
3.Camera parts (not a set to buy) so that give you the ability to replace just the camera or parts.
4. Replace the useless VPS with obstacle avoidance sensors.