I think you guys forgot what Luuk used to be under Koeman, so let's give some time to Ferran. I'm sure he will start scoring. So far every player improved their form since Xavi took charge and have no doubt this will apply to Ferran soon. His passing inside the area is great, finds the open spaces, like that pass to Gavi the kid shot outside the Camp Nou.
On the topic - I'm pleasantly surprised to see Xavi already making massive impact, was more of expecting some good form near the end of the season, but currently the players are flying high. The best February period since Lucho's CL winning 2014-15.