I flew a 10 battery mission yesterday, and besides the focus issues, I also had issues on a couple of the flights with following the route. On the first two flights, all went smoothly. (I REALLY like that the Inspire 1 Pro has such smarts about low battery and landing - glad that MP takes advantage of this!) On the third flight, instead of returning to the point of abandonment, it went back over part of the last leg of the previous flight, then at the next turn, it got back on track. That resulted in a noticeable gap in the mission.
It did this again on either the fifth or sixth flight, (I can't remember for sure). then somewhere around the 8th flight, it flew out to the point of abandonment, and then just hovered there. I had to do a return to Home and try again. It then went flying off course, back over ground it had covered previously and did the hover thing again.
Also, on one of the flights, the low battery warning came through and it started returning to home but then decided to start landing where it was, which was maybe 700 meters away! In a forest! I took over control and brought it back, but that was "exciting", and I'm really looking for "boring" when I fly these missions.
I have a gpx file with the route if you are interested in seeing that. It shows the strange behavior pretty clearly.