Salesforce Integration - Define a Default Value for blank Last Name / Company Name

Last Name and Company Name are required fields for a new Lead to be created in Salesforce.

When HubSpot syncs a Lead to Salesforce that's missing Last Name or Company Name, a value of [not provided] is inserted (which Salesforce sets by default).

Other marketing automation platforms expose the ability for the marketer to set a custom default value in the Salesforce Integration settings, instead of the default [not provided] value.  This would be a helpful feature and save me from creating automation on the SFDC side.