Let's think a bit more here. I like your ideas, but you missed a few great future options.
• Live feed at 1080p, instead of 720, which is just too blurry to see antennas and tiny branches you might be flying too near.
• An out-of-the-box long range remote control (at least as an option for those who want it but don't want to void their warrantee modifying it)!
• A zoom lens would be nice!
• A faster, better camera bit rate, 60 mbps is what many 1080p cameras have, it is woefully slow for 4K, which has 4 times the resolution. I have another 4K camera with a 100 mbps bit rate, and it has such a noticeable better video quality, especially when there is a lot of motion or detail, or both. 100 mbps bit rate should be considered bare bones minimum for 4K, 60 mbps is just substandard and insufficient.
• Increased resolution for stills, without the wide angle perspective.
• quick release gimbal for storage/transport, as well as easy swapping for replacement or upgrade.
• A 3D camera to give VR goggles depth perception! How helpful would that be !?!
• Water proof (or at least rain-proof) everything for all weather use.
• A top center mount bracket for 360° camera or other add-ons.
• The ability to turn-off or turn-down noise reduction at higher ISOs, the current noise reduction is far more annoying than noise is, as it makes everything blurry.
• Sensors to steady that little wobble the Phantom 3 often has.
• Replaceable/swappable arms on the shell, so when you get damage or cracking on an arm, you can easily swap it out.
• Motor mounts that tilt forward/backward for higher speed flying.
I could go on, but that is enough, hope DJI sees this ;-)