Supervision by those who understand the mechanism is necessary to prevent people from falling the victims of their own ignorance. I am sure that the increase in common sense will result in an increase of cooperation. There will be less conflict and chaos because communication will depend less on the number of words and more on their meaning. I think it's a good idea to exchange the unnecessary words for colors and keep the few left for communication of information. Trepanned man will not find it necessary to give meanings to abstract words, or to invent new superstitions.
Gravity is the enemy.
A large part of adult behavior is motivated by the fear of losing the grip on what blood is left in the brain. Trepanation, by restoring the blood lost in the course of growth removes the main cause of fear. In a trepanned society there will be more individuality and independence than in the present one. I think the state should serve the individuals, not vice versa. It should provide all essential needs.