The midfielder left Girona for Barca in August, but struggled for regular minutes under coach Xavi.
He said, "Have I learned something? I've thought about it many times, but yes. When I was on the bench, I tried to mentally position myself for when Xavi told me to come on. Once on the field, the adrenaline is higher and if I lost a game I couldn't sleep... it's different being on the bench than on the pitch.
"I really value what Busquets has done but I didn't come with the intention of replacing him. I demanded more from myself than what they said. When you make a decision you do it with what you have on the table... I would probably make the same decision if it were repeated.
"Barça comes to you with an offer on the table and they tell you that you will be very important... Then you learn if it works out one way or another, and you believe what is best for you, but at that moment it is what it is."