Barcelona has do some mistakes because they failed to win from Inter twice so this makes their opportunity to qualifying will be very slim and hoping Viktoria Plzen can beat Inter Milan is just like a mission impossible especially at Inter Milan home ground so it's their own fault why Barcelona cannot win in the last 3 matches in this competition and now let's be realistic that Barcelona has been failed to displayed impressive performance and they have to play at Europa League two times in a row and so far this is also their poor achievement and apparently playing well at their domestic league won't guarantee them to get best results on champion league
I also think that Barcelona will hardly continue in the Champions League. They should go to the Europa League and maybe have better luck.
This season, it seems that some of the big clubs, will drop to the Europa League, we have seen some surprises. And now that there are only 2 games left, it is starting to see who is in the best position to continue.