I have ofc no clue about the team structure. But he actually seems like a guy who is told, "Amanek you will do this and this", says "Oui" and does it. When you are an IGL you want this kind of player, who will maybe not explode on regular basis, but he will kill the people he should kill and in the end, he can handle even really hot situations under pressure.
Amanek is honestly one of the most underrated pros atm. in my opinion.