Looking at his stats he looks like backup for Thiago. A great passer (92%) but his weaknesses are tackling, aerial duels and concentration. He is 171cm so not the biggest. Played well in Barcelona but Italy has not agreed with him. Actually his injury record is not bad, he missed a big spell after an operation but other than that a game here a game there. Worries me that his concentration is suspect and he is a little small, we need another bigger midfielder. In Italy they complained that he is a sideways passer, we will see.
There is no obligation to buy so cannot see the harm, hopefully he sees this as a second chance to improve his stock which has declined after Italy. I think they paid 55million for him and now his value is more like 20 million. Seems like a real moneyball signing where the player is better than his value, even though just a loan. We have a lot of Portuguese speakers so hopefully he makes a place for himself and he is actually in his prime at 26.