My biggest complaint with the automatic events has always been the inability to treat them as my own events. If I want to make any changes to the event, I have to copy it to my calendar. Doing so means there are now two versions of the same event, and the one I copied will not automatically update if there is a change. I've seen the automatic events update when, for example, my itinerary changes.

I also hate that reminders do not get shared with other events and are google calendar exclusive. This means I can't use a third party calendar app on my phone if I want to use reminders.