The exact opposite.
The entire point of loans is to get our players some game time. When the club getting the loaned player knows he is just going back to his parent club, no questions asked, it disincentivizes them to develop the player.
I am saying that if we include a pretty substantial option to buy, they likely aren’t going to pick up the option barring some unbelievable circumstances but at least they would have motivation to play and develop him because he COULD be a player of theirs if things go well.
Hopefully he hits the ground running and Espanyol have no choice but to select him but I have a feeling if he doesn’t, and drops a few stinkers in a row, they’ll go back to what got them promoted and he’ll be back where he was at Sevilla.