The master plan is more focused on established cities, it works better with extensive development of territories — when the expansion of the city is carried out through construction "in the fields", and not the intensification of the already existing environment.
In the case of a master plan, we start from the current situation and look for mechanisms for further development of what is already there — such a complex spatial and social organism, which is almost any large city. This approach requires special attention to communication issues: there are always some interests, property rights, and to achieve the goal, it is necessary to find common ground.