Sexton's work ethic and desire to improve is great. I just wonder if he knows what skill he's actually most deficient at.
IMO, it's his court vision and feel/awareness/BBIQ. These are extremely hard to learn, and can't be learned by yourself in an empty gym. They also can't be learned by waving off the play and going one on one every possession. Jordan Clarkson has been in the NBA for 6 seasons, played 3 seasons in college, played for the Philippines National team. Yet, still is severely lacking in court awareness.
Self awareness in life as well as basketball is normally one of the last things you finally learn, if you learn it at all. The league is littered with seemingly very talented hoopers who never "got it". If Collin is thinking "I just need to get my 3 point shot more consistent and my drive left/right/left cross perfect.." he's going to be a long ways away from reaching the potential we all see.
This is why not having a viable vet PG/G on the team stinks. Love can bark at Sexton all he wants, but Kevin isn't dribbling by 3 guys and finishing in traffic. And throwing Clarkson out there who basically plays like Sexton already isn't helping. Need a guy Beilien can point to and say "I want you to play like that, make those plays, and you'll get more burn."