Boredom can't set in when the players must be totally focused and concentrated just to keep from making a mistake which would bust a rapid pivot and pass drill. You asked about some things to teach to make your team a more solid passing team. First they must have the ability to pass equally well with either hand. Ninety percent of the teams I have coaches against have ninety percent of their players who can only functionally pass with a strong hand. Second, teach your players to pass on balance.
Most passing mistakes occurs because players attempt to pass off-balance.
Third, I want my teams to be able to pass and make quick decisions off of hard cuts, or full speed sprints. You can tell a poorly coached team by how they pass on the fastbreak, or when pressured. Make sure in each of your practices you spend at least 5 minutes passing from sprint and sprint and stop movements. This is a basic fundamental of good fastbreak teams. Sprinting ahead of the ball.