Needs 2 full seasons WITH spring ball and same assistants. I believe they can make the changes but not without having opportunity to teach and recruit to the new system.
This team is slowly improving defensively but it is going to take time to learn where to be. Too much expected without time to train and teach these players or new ones for that matter.
Those that want to fire them are just wanting things to magically get better and that will never happen. Without support you will see things get worse not better regardless of who coaches.