His price jumped from 3,5M Euros to 30M Euros in the last 18 Months.
He is a La Masia kid who came to Croatia as a part of Halilovic's deal.
In his case, a sale/loan worked awesome. If he stayed at Barca B, who knows how would he develop in the meantime.
This way, he played all the time in a 1st division, he played Uefa Cup every season against decent European teams and now he will play a CL against the best teams.
He has Xavi's little turns and shielding of a ball, plus he has a natural gift for dribbles, key passes and shots in the box.
I would call him something like Xavi in the box who is dribbling and scoring.
He isn't too fast, but he can dribble, and he is still faster than let's say Busi, Raki, Arthur.
You'll see more of his midfield movement, dribbles and passes here:
In this video there are goals: