He could introduce a new training program focused on the combination of different ninja skills. Naruto, with his own unique combination of skills, would understand the importance of versatility. This program would encourage ninjas to learn from each other's specialties, like a taijutsu expert learning some basic genjutsu.
Well, he might implement a policy of more open communication between the different ninja clans. Since Naruto has friends from various clans, he would want to break down any barriers. For example, he could start regular meetings where clan leaders can discuss issues freely, promoting unity in the village.
Naruto might also create a policy for better integration of non - ninja villagers into the life of the Hidden Leaf. He could set up more community events that involve both ninjas and ordinary villagers, such as festivals where ninjas can show off their skills in a non - combat way and villagers can contribute with their own talents like cooking or crafting.