Drance is probably parroting Cam Robinson, who I think has made the most astute comment when evaluating JL: "[paraphrase] He tends to struggle with making the optimal decision every time he has the puck. Most of the time it works out because he's so skilled, but he misses plays that could have been better".
That, I think, is JL's greatest weakness. His speed is good enough, and his 2way game is satisfactory, but it's his read to utilize his teammates that could be better. Sometimes he falls back to deferring to them instead of looking for his own shot first.
I don't see it as a huge detriment. Other shoot first players have done this in the past and have still had great careers. He will develop this over time, IMO.