Create AutopilotHQ Custom Salesforce Object for Logging
You have a great integration with SF (though it would be nice to see continued development to support custom objects and other features). However, when you turn on activity logging it creates, well, activities in SF. This results in the calendar of the person used for the connection between APHQ and SF being cluttered with tons of entries which can crash Google Calendar after large sends. The alternative is to burn a SF license just to connect to APHQ - that's very expensive (at least $1200/year).
What numerous other marketing automation platforms do, such as Pardot, is have a custom object in Salesforce specifically for their integration. Activities are then logged to this custom object with links to contacts, leads, accounts, activities and other relevant objects. This not only reduces the clutter, but also lets you create SF automated workflows that action off new entries in this object and also create richer reports than when using activities.