10 second delay option in New Outlook is simply not enough, previously you could build a rule to delay send on outbox by any number of minutes you wanted. The simple solution for Microsoft is to increase the slider option up to 10 minutes as an example instead of 10 seconds. We are not deploying New Outlook to 100's of our staff and this being a main reason.
We need a way of choosing to delay send in New Outlook by a configurable amount considerably higher than 10 seconds.