My list of 10 most urgent improvements: 1. Faster AF. I think it's mostly a matter of power of in-camera AF motor, not so related to sensors, their layout and algorithm. Just use the PZ-1/MZ-S AF motor and you'll get a very fast AF.
2. Faster AF. 3. Release a decent RAW converting software. Current Photo Lab is useless, working worse than in-camera straight conversion. 4. Release some good digital lenses above 45mm and below 300mm focal length. A 50-150mm/4 would be a nice start. 5. In-camera IS. 6. In-camera flash compensation. 7. Instant histogram and crop histogram (a histogram of cropped area when you zoom on it during instant review). 8. On-sensor anti-dust feature. 9. Fix the door/strap problem 10. Make the 4 way switch bigger.
