Hi, Peter.
Thanks for your interest in our plugin suite.
Yes, that’s correct. Event Aggregator can import and update, except it cannot update if the event is entirely deleted.
In other words, if an event from Google Calendar gets modified, it would modify the WordPress event (depending on your settings within the plugin) — like change from Saturday to Sunday.
However, if it gets entirely deleted from Google Calendar, the Saturday event won’t be modified at all within WordPress.
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
I hope this info helps. Let me know if you have any follow-up questions.