If you ask me, the news of. Victor Gyokores is becoming tiring. Heck, how difficult is it to get just one player. If it were clubs like Liverpool or Chelsea, what you'd hear is ,"Chelsea have signed so and so player " and that's the end of the story but with how prolonged the Gunners are making this matter be, I feel that the disappoinment would be much if it happens that the deal falls through.
I don't think this is any of Arsenals fault, Sporting CP are making this deal difficult, and the deal has only progressed because the players agent reduced his commission. Right now, i believe the final details is the €10m add-ons requested by Sporting CP, if they can work that out, then it should be "Here We Go" very soon.
I don't like how clubs overvalue players these days, and force the hands of the buyers to overpay, Arsenal are following the right approach, and they would get their man soon.