Nance Jr. isn't an all-star by any means, but I can think of dozens of players who have all the talent/athletic gifts but none of the heart or desire. So I look at him from both glass half-empty (the bad) and glass half-full (the good).
Glass half-empty: Because he doesn't trust certain players (Sexton), tends to play buddy-ball (picking favorites with Clarkson).
Glass half-full: Can make the smartest play on the court, racking up the most assists on a team lacking real play-making (except maybe Dellavedova).
Glass half-empty: Bad shooting games, especially last night. He couldn't hit anything.
Glass half-full: He's actually +50% on field goals, usually double the distance of Zizic and Thompson (8+ feet on shots compared to the 4+ feet from the aforementioned). My guess was he had a terrible shooting night, it happens.
Glass half-empty: Taking rebounds from teammates, stat padding.
Glass half-full: Many of the games played, he's the tallest Cav on the floor (with TT/Love hurt and Zizic subbing in), so who's actually supposed to box out the other centers? And 30% of those rebounds are on the offensive glass?
Glass half-empty: He's playing too many consecutive minutes, so he's not always able to play with energy (12+ minutes through the 3rd quarter last night).
Glass half-full: On the other hand, he not only has the best Total Win Shares (3.1), Win Shares per 48 minutes (0.130), the best Box Plus/Minus (3.8), and Value over Replacement Player (1.7), but also in general the best overall player. Can't really help the games multiple players have missed with injury nor the quality of the players on the roster who have played. He's even won a game for us at the buzzer (tip-in vs. the Pacers).
We really could go much worse than with Nance Jr. No, he's not a fraction of the player his father was, but I don't see him padding his stats (a la Ricky Davis). There's hope that he could be a part of the future Cavs (when they are ready to compete again).