#1 Inconsistency against big teams
PSG's utter dominance of Ligue 1 means that their players are very rarely tested in the league, and it is in the Champions League where they truly get assessed.
Adrien Rabiot has been accused of being inconsistent in PSG's biggest matches on the continent. He put up a midfield masterclass in the 4-0 demolition of Barcelona in the first leg of their round-of-16 Champions League clash two seasons ago, then followed that up with an absolutely lethargic performance in PSG's second leg capitulation against the same opponent three weeks later.
In PSG's biggest match of last season, Adrien Rabiot also posted a no-show over two legs despite scoring a goal, and came in for particular bashing due to his pathetic lack of effort in tracking back and going into tackles, which contributed to PSG's two-legged loss and elimination to Real Madrid.
Barcelona have underperformed in the Champions League in recent seasons, and after sustained domestic dominance, the club's aim would be to reverse its poor recent record of having been eliminated at the quarter-final stage in each of the last three editions of the UCL. A stat made more bitter by the fact that all three editions have been won by their arch-rivals Real Madrid.
Adrien Rabiot could contribute his fair share to continuing Barcelona's dominance in La Liga and the Copa Del Rey, but it is in Europe where their aspirations lie, and that is a stage where the multiple time Ligue 1 winner could find himself struggling as he has so often done in the past. Hence, it would be foolhardy for Barcelona to sign him, as it could prove counterproductive to their European aspirations.