From now on, everyone can assess the abilities and strengths of each team that is still in the Champions League competition, especially when entering the playoff round and also the last 16 which will generally be much more competitive than the current round. And for the example of the team you said, it is true that not all teams can be good in the UCL competition even though the team is still very good in its own domestic league by occupying the top position and becoming a candidate for champion.
Looking at the current UEFA Champions League standings, it seems difficult to avoid super big matches between top teams facing each other in the playoffs due most of the top teams outside from the top eight position standings.
Manchester City, Real Madrid, Bayern Munich, Atletico Madrid and PSG have fight for securing the playoff round spot place behind difficulty reach the directly qualifying to knock out round due losing many points at phase league matches.
Have consistent performance at domestic league can't guarantee easy reach the higher standings position in UEFA Champion League, PSG reach the top standings in domestic league have losses from Brest or Lille due their current standings at the top eight with directly qualifying to knock out round, difference with PSG have to fight at two matches left against Manchester City and Frankfurt if want reach the playoff round spot place because reaching the top 8th standings have been over for PSG.