If this rumor is true, i'd be pissed. The club needs some sort of deputy for MSN right now the only ones that look capable are Rafinha and Halilovic. Also with Iniesta inevitably getting older next season we'll need to reinforce the midfield again, what better way than with Halilovic.
I don't want to be a bad guy, but since I am watching Halil for 4-5 years, imo, he is NOT a (Barca's type of) a midfielder.
In the current Barca's setup, if in Xavi-Iniesta or Iniesta-Raki duos, Raki and Xavi were classic central midfielder, and if Iniesta and Rafinha are something like Amc's, then Halil is a few steps more attacking then Iniesta and Rafinha.
He is a RW, and he COULD play as an Amc, but in teams with different setup than Barca.
He was always a player, who when gets the ball, more or less in 90% of cases runs towards the goal, very fast.
In general, that is not a bad thing, but it is a somewhat problematic thing for a Barca's midfielder in 433.
When Raki gets the ball, he looks for options, he slightly slows down the play etc. He doesn't need to play "a killer pass" in every action.
Iniesta does the same, although he is more attacking and he tries dribbles and "faster actions" more often than Raki.
Halil isn't (at least yet) the kind of a midfielder who will touch the ball 50 or 100 times per match, who will try 80-90% of simple passes, and 3-4-5 deadly balls/actions per match, in a perfect moment.
He has an attacking "instinct" and when he gets the ball, he tries to score every time, or create a deadly opportunity for his teammates.
Again, that is not a bad thing in general.
But that is not exactly what we are looking for in (Barca's) midfielders.
And before anyone replies with: but we are playing counterattacking football lately, he will fit perfectly.
Well, that is simplifying.
Let's say that under Pep:
= we played 98 slow actions and 1-2 counterattack actions per match
Under Lucho:
= we play 80 slow actions and 20 faster/counterattacking actions per match
(So, NO, we don't play counters ALL THE TIME. We play them more often than before, but it is not as if we are suddenly a counterattacking team...)
About Halil as an Amc, imo:
= he plays counters in at least 50% of his actions
And again, before some replies: but that is because he plays at Gijon.
Well, not.
He played exactly the same way at Dinamo Zagreb, at youth NT Croatian teams, at Croatian NT team, at Barca B and Gijon.
So, imo:
-- for Barca, he can only be a winger. And the time will tell whether he is good or not good enough for our required level
About him as Amc:
= NOT in Barca's 433 system
-- he can be an Amc in some 451s or 442s and in teams who play much more direct and with less possession and touches then us, and where he can be a key player
I see him more as some kind of Alexis, who can be a midfielder in Chile and Arsenal, but not in Barca.
I see that people are planning our future, and a lot of fans are saying how we don't need a midfielder, because we have Rafinha, Halil, Arda and similar guys.
Well, currently we have only Raki as a pure central midfielder (and Roberto, but he will probably never be a starter level).
So, you should plan the future with or without Halil as a RW and similar.
Him as a MC or AMC in Barca? Extremely, extremely hard.