For Barcelona vs Inter game will not be that easy as Inter can be happy also with a draw in this game so that can make things pretty difficult.
Bayern Munich played well in the UCL but the games in their League were poor. They are in fifth place. Four games without a win. In the UCL I think Bayern Munich are the favourites to qualify for the knockout phase. Inter and Barca will probably be scrambling for second place. When compared to actually I am more sure if Barcelona win. Barcelona is pretty good in the league, while Inter is unstable. The second game certainly competed seriously for second place. The defeat to Bayern Munich is not the benchmark for Barcelona failing to qualify for the knockout Phase, there are still a few games so there are still many opportunities to have.
Which is another proof that teams playing in continental cups and playing in regular league games are rarely the same mindset. Frankfurt ended up winning europa last year, and they were something like 7th or something in the league if I am not wrong, Roma won the conference title for the first year, and they were low on the standings as well.
Real may have been a winner and finished well, but Villareal went further than anyone expected and not so great in the league. So, it's easy to see that teams play differently in UEFA cups, whereas they do not care about the league as much as they care about those games, they play with truly their 100% when they are there.