If we look at pre-season matches, of course we can't see the final results of the match as a reference, but from these matches we should be able to see how the coach can improve his team performance and also make the players cohesiveness better, Apart from that, I think Motta is currently looking for a the right framework team for him to rely on next season.
Judging from the two last friendly, I don't think juventus has improved, they just played two different teams with different playing patterns hence the coach thought that his players have improved. I didn't see the match but looking at the statistics of both games I can say juventus are still concentrating on a possession football but not attacking enough because their shot on targets is dropping but their possessions control is increasing. The coach has to focus his attention on the team attacking more often than they hold the ball. When you have possessions but you don't win the game, the whole possession control was a waste because at the end of the game, what matters is who is going home with the 3 points and not which team played the better football. Juventus created lass shot on target against Atletico Madrid hence they they don't do well against teams that have a strong defence.