I think that scheduling the emailing of payslips is a great feature. Especially for those who need to send payslips while away, or those who process the payroll a few days before emailing the payslip...
This would be great as we always schedule payroll for future dates (salaried, casual and part time staff as different payrolls) but need to make sure someone sends the payslips on the day payment is made. This is a task that gets missed regularly.