I wouldn't say they are addressed. The GPS is still a weak point on the Solo. All I have to do is lean over my Solo for a brief second or two and the GPS will lose lock. This doesn't occur on my other 3DR GPS.
I know my Solo's GPS shield is not hitting my antenna stub, I was very careful to position it, and confirm it's ok and at least 4mm away from the stub.
But my Solo will have a hard time getting GPS lock, and keeping GPS lock, where my other 3DR GPS (the one I purchased with my Pixhawk) works perfectly without all of these issues. This one works great with the PixHawk:
3DR uBlox GPS with Compass Kit - 3DRobotics Inc
I also believe the Solo has sub-par GPS and communications link compared to the state of the art and what is possible today. Many have tried to argue differently, but my own experience with the Solo shows the WiFi link is sub-par to what is available for controlling the bird, and the GPS is sub-par to what is available.
Let me be clear that I'm comparing the Solo to other 3DR products, so don't think I'm trying to compare it to the DJI or any other brand.
I've heard some people are now saying that first batch Solo's are better than later batches. If this is the case, please, someone tell me how to get 3DR to update my Solo to be as good as the later batches, and let's have 3DR tell us how to determine if our first batch Solo's are sub par? What serial number did changes in manufacturing occur to fix any issues?