he lacks brain - that will not come by time.
There is a learning curve in coaching like in any other job. Remember how ancellotti started and look at him now. You learn new techniques, see patterns that you didnt do before, experiment with new formations and new tactics. The 3-5-2 came out of Juve for example. He used to play a different formation before that.
You dont achieve what he achieved without a brain. If you can get Vucinic, Quags and Matri all to score double figures you need brains to figure out the right formation that plays to the squads' strengths without being as awful as we are now. Players like Pirlo and Bonnuci benefited from Conte's motivation no doubt about that but also from the formation he picked that played to their strengths and minimized their weaknesses.
Allegri has spent 3 months trying to figure out what formation fits the squad and still has not found it. Mind you, this is not a 7th place team, its an almost world class squad half of which were finalists last season.