Okay so my things I look for in a clip. Lightness on his feet, quick hips, speed, bounce, length. He as all that at a high level. Does he have touch? Does he have ability for defense? Is he competitive and coachable? If he does then he can blossom into a very good player. If he has PG skills then I would be tempted to trade (reluctantly) Keyonte George to acquire him. He could be a better long-term prospect.
No need or desire to trade Keyonte for him. The sample sizes are small from the NBL, but I could see him rise in draft discussions. There could eventually be some debate between him and Jakobe Walter, if you think Walter is going to be passive and inconsistent.
The thing that jumps out about Johnson is his speed getting downhill on drives. The way the Jazz have been using their guards to attack seams that could be appealing.