More flexibility in Windows Server Backup Scheduling
Current daily only (or more frequent) schedules in Server Backup mean that this does not work well on larger servers where the maintenance mode initiated for large (TB) volumes can mean backup running almost continuously. If Server Backup could have ability to run backups less frequently and with multiple schedules without having to manually configure this as command-line jobs through Task Scheduler (i.e. every Tue @ 3am backup system volumes, daily backup fast moving data volumes, every week or even two weekly backup of slow moving TB volumes, etc.), this would make the built in capabilities much more applicable in more scenarios - especially useful for SOHO and SME scenarios where the cost of "pro" backup software is a significant additional investment.
Andrew Macaulay commented
This would be especially important on the Essentials SKU or role, where the built in backup is monitored as part of the health check, so 3rd party tools would trigger alerts which would need to be ignored (not a great idea).