Cron-style schedule for campaigns

The ability to choose a complex schedule would fill a very big gap we have in Vero right now. Some schedules might be: Every weekday at 16:30 i.e 30 16 * * 1-5 From Tuesday to Thursday at 14:00 i.e 00 14 * * 2-4 Currently only being able to choose every day, week or month is not sufficient for our needs and means we have to create a separate campaign for every day, increasing the risk of human error.