After the Jan 2016 season for arena, does KD reset

Or does it stay as whatever KD you have when it ends? on your service record on the game and on here?

Your KD is your KD. If you are asking for a Season Summary, that would be cool. I highly doubt any of us, like myself, want our hard work and record abolished every new season. How it is now gives a good look for recruiting running mates in Arena