#3 Moise Kean rediscovers his mojo at PSG
However, the player that broke through for Juventus and set tongues wagging in Serie A still exists, and looked a lot like the version of Kean that turned out for the Bianconeri tonight.
The first goal was classic centre-forward play. An incisive run to the near post, getting ahead of his marker and diverting the ball into the net at exactly the right angle.
He also displayed his knack for being in the right place at the right time for his second goal, tapping the ball into an empty net after unselfish play from Neymar.
Kean is still raw though, and missed some presentable chances as the game went on. However, he's begun life in Paris very well.
#2 Tuchel's back-up options shine
There was always going to be an element of risk when Thomas Tuchel decided to rotate his line-up for this game. Given PSG's lengthy injury list, some may say it was enforced. However, PSG have a deep squad, despite criticism of their recruitment by their head coach.
Sergio Rico was excellent in goal, while PSG's rejigged backline eventually settled into the match after a few nervy moments early on. Julian Draxler reminded us of his quality with some excellent passing, especially to set up the counter-attack that resulted in PSG's second goal.
Tuchel will have to depend on these options quite a bit, as the injuries will keep coming in a packed fixture schedule. Performances like these will only serve to earn his trust, which ought to be good for all concerned.
#1 Kylian Mbappe's cameo simply produced more questions
There's no doubting Kylian Mbappe's quality. The Frenchman tormented the Dijon defence as soon as he came on to replace Moise Kean in the 73rd minute. Mbappe was full of direct running as ever, with an absolutely powerful finish for his opening goal. He also positioned himself well for his second, which was a routine tap in.
Yet, this sort of performance has been missing in the big games of late. It seems churlish to be critical of a World Cup winner, especially after this performance, but it's still apropos. Mbappe is only 21 years old and considered one of the world's best players, yet has failed in many big games for PSG.
The Frenchman was kept quiet by Axel Tuanzebe against Manchester United, as an example. He has to produce moments of magic on tough nights, not against Dijon while leading comfortably. PSG's Champions League group is tricky, and we'll get the answer from Mbappe one way or another.