Although Neymar is often injured but still, Neymar has a total of goals that are still fairly good when considered with the opportunity for Neymar to play in between his injuries. Therefore, if Neymar is not injured, of course, Neymar will be even better and maybe PSG will also have a great chance in the Champion League too. But yes, unfortunately Neymar is often injured which results in PSG getting inconsistent results throughout the season.
Neymar usually gets injuries before important matches for PSG and his national team Brazil. It is a little it weird and looks like challenge for his destiny and career and we don't know the fact but what has been happening with Neymar is very painful for him.
PSG as a club that pay very big money for transfer and salary to the player, actually expect to get more contribution from Neymar and don't want to see his injuries before important matches that can decide they will go far and win title in Champions League.
In my view Neymar's style of play must be changed a little and the coach must also instruct him to play safe because after all he often shows individual skills on the field which causes opposing players to get emotional, so hard tackles occur and can bring Neymar to injury in the match.
Neymar did try to reduce his dribble a lot after getting some serious injuries but we saw sometimes he unfortunately got injuries from very unwanted situations. It seems his ankles are no longer strong enough to prevent injuries for him and sometimes his own touches to the ground caused his injuries that not actually contributed by strong tackles from opponent defenders.