Get rid of the dispatcher and you've got no-one to take full responsibility for the safe and efficient turnaround of an aircraft. That means no-one to:
Check the loaders are loading the correct bags cargo and mail into the correct holds...
Check the gate staff are boarding the correct pax in the correct manner onto the correct plane...
Chase up all the service providers and ensure they are keeping to SLA's
Check the fuelling is correct and that correct fuelling procedures are being followed if pax are boarding during fuelling
Ensure the aircraft is in trim and produce and/or check the loadsheet is correct and reflects the way the holds are loaded and the pax are sat
Sign off all the paperwork
Ensure all DfT, CAA, airport and airline rules and regulations are followed
Account for every minute of every delay
Spot and rectify the mistakes made by the increasing number of poorly trained low paid staff currently being recruited in an attempt to cut costs
Offload the drunk and the aggressive before they get the chance to wreak havoc at 30000 feet... (and find their bags)
Reassure the nervous and pacify the delayed and the disgruntled
Deal with just about everything else that can and does go wrong during a turnaround...
Get rid of the dispatcher and you've also got no-one to blame...