For Barcelona, seeing from their current condition and position in the standings, they actually only need to prepare themselves to wait for their opponents later because seeing from what is happening now they are the second club that will follow Liverpool to wait for other clubs to complete in the knock out phase so they are already breathing more comfortably for now.
But precisely the test is after the knock out because in the previous era they even always struggled and their best achievements only reached the quarter-finals and that's what Flick should now try to change because after all, even though they have managed to get a direct qualification position, the real test in the Champions League is to be in the knock out stage until the final and not a few surprises or even situations that are very difficult to happen including for some big clubs later.
Barcelona collect 15 points from 6 matches their opportunity to qualified is very wide open because mathematically Barcelona only required 1 point to secured their position on League table and their upcoming opponent is Benfica which i am sure Barcelona can able to earn 1 point from this match or even Barcelona can beat Benfica indeed knockout stage is the real test for Barcelona because in the last 4 year Barcelona best achievement is only quarterfinal
So Hansi Flick should be able to bring Barcelona to gets the higher achievement than the previous one and Hansi Flick is experience manager in this competition because he can able to brought Bayern Munich to get the champion league trophy in the 2019/2020 season so i am looking forward to see how far Barcelona can go in this competition under Hansi Flick
It's going to be difficult because at the end of the day, although we can be pretty sure that Barcelona will definitely qualify for the knockout phase, there's no guarantee that they'll be able to make a breakthrough because at the end of the day, the situation can sometimes become unimaginable in the knockout phase and other higher phases.
If in the end for now Barcelona and Flick still want to be considered as one of the coaches who will bring Barcelona to the era that Barcelona has always said then surely now their momentum is still maintained but in the end this must also be maintained because after all their performance even though it is still very good but there are starting to be changes that occur especially in La Liga.
When they can't improve that and make the situation better then it could be that what happens in La Liga also carries over to the Champions League so it is important for Barcelona and Flick after making sure they qualify then in the end they must try to continue to maintain their performance in this second half of the season.