Sharing the ball should be a priority for Johnson
During the regular season this past year, Johnson averaged just under two assists per game. He is by no means the best playmaker on the Spurs, but running the offense was primarily delegated to DeMar DeRozan and Dejounte Murray.
Even so, Johnson is entirely capable of making good reads on offense. If he can hit open shooters on the perimeter when he drives to the basket, this could make the lives of the team's sharpshooters much easier. He doesn't need to do anything too extravagant with the ball, but doing his part in helping the team to avoid too much isolation ball would be ideal.
In their game against Spain, the best things happened for the team on offense when the players moved the ball well. While having Holiday around will certainly help, after the departure of Bradley Beal, many were still hoping that the team would add another playmaking guard to the roster rather than Johnson.
If Johnson could muster up even one or two quality assists in each game, he would be doing the team's scorers a huge favor. Being that this is something that he isn't necessarily known for as a player, I could see this being an interesting challenge for him, but something that could dramatically help his growth back with the Spurs.