There will be a lot to be expected from him; he is known for anti-corruption thus corrupt people and politicians will flee or hide from his wrath. Moreover he ruled well when he was a military head of states from 1983-1985, with good records. He is going to change almost every situation that the poor people of Nigeria are facing; by giving people equal opportunity and equal hand to access the good things endowed in this country. For me, I believe with Buhari Nigeria will be a better place to live.
Well as for the kind of change that will take place,I don't know...But as per who is a better leader I think Buhari is a better leader in terms of handling issues bothering on security given his experience as a former military officer...During his time as head of state,militants from chad took over some towns in northern Nigeria but were later recaptured and those militants chased back.Also was case of another sect with thesame ideology as Boko haram which troubled the north in his regime,once again Buhari succesfully dealt with them...Therefore my opinion is that Buhari will handle the Boko haram issue better.