It's hard to find a right back like Juanfran. I think he has been sensational through the season and can be rated as one of the best players in his position just behind Carvajal.
Juanfran provided 1.4 key passes per game and its the second highest in his position. (The best one is Carvajal, 1.5 key passes per game.)
It would be very sad to see him leaving.