Nothing new here: even if Harris does not "improve" at all as a player, being the main point guard and being injury free should boost his production quite a bit, definitely enough for someone to say that he's "improved".
One thing that will happen will be that his stats improve because he will most likely be the second option in this offense. I look for him to have that career year. He is going to score at least 15 point and dish out 5 assists, that is barring injury.
can't wait to see a full training camp and Harris for the whole season. He quickly became one of my favorite players.