The equalizer of Lewandowski is not enough for Barcelona. That goal only delays the day Barcelona will officially be delegated to Europa League. In addition, the outstanding performance of Inter Milan shows that they will likely to win against Plzen. I don't think Plzen will be able to have points from Inter Milan that means Barcelona will know where they will play after a next match day.
haha, yes, I have heard that now they complain about Lewandowsi's goals, as they only gave hope for a lucky ending (not really realistic scenario to be honest), without his goals it would be sure they are out. Maybe indeed sometimes it is better to know how bad the situation is. But still, extra $cash$ is always appreciated.
I think Inter will not have any bigger problems with Pilzen and Barcelona will be clearly out of the game.