I've had my 5d3 for about 18 months, and find very little need for improvement. It meets almost all of my expectations for a camera in this range. My 7d is definitely due for an upgrade, and I'm looking forward to getting the 7d2. But I have to admit I'm not in much of a rush to upgrade my 5d3, and have very few suggestions for improvements. As always, improvements in high ISO, improvements in DR, and improvements in overall IQ are what we all want. Beyond that, I still LOVE my 5d3!