Looking at the current conditions of the two clubs, this could actually be easy if you look at Barcelona's performance. it's just that they have to be able to try to be better in terms of finishing which indeed in the last few matches it seems difficult for them to do that.
But with the chance they want to finish La Liga faster I think these 3 points will be easy.
Barcelona only needs to win today's match even if not by quite a lot of scores, because Barcelona only needs three points to make sure they become champions this season in La Liga. And from the head to head results that already exist, Espanyol has never really won against Barcelona in any event in Spain. So today should be a very beautiful day for Barcelona because I also really believe that their ability to win today's match is still very big even though they have to celebrate at someone else's stadium.