I have noticed some lag on my phone. Still monitoring my phone as well. Temps for me have been running 120's. Running too hot. Just from minor internet usuage as well as music running. All my non used apps have been properly closed. My phone is sick and has a fever.No significant lag. I did have a couple of random dropped calls last weekend and very early in the week, which was weird since I was in a good reception area. But I have had none since. Still monitoring that.
No significant overheating either, just normal warm when fast charging.
Would be a bummer if I had to go do another exhange.