I believe that Ronaldo’s exit will help Manchester United when they face Barcelona, because they’ll not be distracted by his antics on and off the pitch. Furthermore De Jong and Deepay will most likely stay at Barcelona at least till the summer transfer window, but beyond that Barcelona will have to convince them to stay otherwise I’m sure that they’ll move on to a club that makes them feel valuable.
Ronaldo himself has rarely been played by Ten Hag in the main squad. so Ronaldo's departure will not bother United. the match against Barcelona, of course, is a game of tactics. those who can overcome the opponent's tactics will get the victory.
there is still enough time, I'm sure both teams can focus first on their league. quite a long preparation, hopefully, the fight will be entertaining.
Yes, I also believe that Ronaldo's departure will not have a negative impact on Manchester United's performance, because it is possible that Ronaldo's absence in Manchester United's squad might make Manchester United's performance better. Also regarding Barcelona with the issue of their key players who might leave Barcelona like the name mentioned, I personally also think it's possible that with their departure and then Barcelona will get other new players who might be even better.
Because basically we won't know for sure which player is more appropriate for the team, because of course all possibilities can still happen.
But if I only consider their abilities so far, basically they have abilities and/or qualities that are not much different. Because after all, there will always be strengths and weaknesses, but not only from the players but also from many other factors such as coaches etc.
Because before they play in the Europa League too, they will experience a reshuffle of the line-up due to the transfer window. Even though the reshuffle may not be too big, but still, it will also have an impact on changes in their performance later.