Tiago is playing in the kind of midfield system he has excelled in before, with Benfica, Chelsea and Lyon, with 3 man midfield. Useful movement and keeping the flow, when he doesnt have to be so dependant on defending the center with just 1 another player in 4-4-2, lacking there. But mainly his issue his attitude. If stops being such a pussy, he can be useful off the bench in this system.