For any of the Unleashed guys, problem or not, I highly recommend the log/retune process. It doesn't cost anything except some time and a blast down your favorite highway on ramp.
I'm not very deep on the 2015 but the 2013 got better every cycle, sometimes just a little but by the time I traded it, the car was about as perfect as I could ask for.
Imagine my horror on the drive to the dealership when i flashed it back to stock, lol.
11 total tune revisions.