I experience "servant leaders" crash and burn. It's often done so poorly. They never make decisions, they just keep making vague requests for the team to come to a consensus and it's chaos. Also, another con of servant leaders is that they often don't hold people accountable. Bad behavior on the team starts to spread and moral tanks. Yes, the concepts of a servant leader sound nice, but it's often implemented horribly. Sometimes the leader needs to be aggressive, make unilateral decisions, and hold people accountable.