Let’s cut the chase and delve deep into the main subject straightaway.
A leaderless team is not only like a ship without a rudder but also one without a motor. Not only does it not have a sense of the direction in which it wants to go, but it barely move at all.
Such teams lack innovation. There is no incentive to think out of the box and even if a teammate tries to do that, others ensure that the idea never gets implemented, since it can potentially alter the status quo.
Such teams also see a huge increase in personal rivalry among the performing and non-performing members of the group. Frictions are bound to happen since every member wants the same respect and importance that is enjoyed by the rest, but no one wishes to emulate the work done the performers of the team.
Indecisiveness is the characteristic trait of such teams. Common ground is rarely achieved. Biasness seeps in and the team works on passions and emotions rather than on common sense and principles. Individual members run their own agendas and keep clamouring about things that matter to them alone.
The lack of accountability in such teams make matters worse. When faced with external supervision, such teams are able to finish the tasks at hand, but the work generally lacks quality. If the task leader is good, then the work done will be up to the mark. If the task leader is mediocre, their work will also reflect the same.
And the list goes on and on, but I’m sure you get the gist- leaderless teams are inefficient, and they will always remain so- unless the members are changed with those who are highly motivated, or the incumbent themselves become more motivated, or still better, the team gets a motivated Leader.