Be able to update details page, even if there are registrations.
It is incredibly frustrating being unable to edit the main details of the event, just b/c people have already registered. We had a time change for our event, and since I can't update the details, it is confusing to new people registering. Our webpage says 9-12 but our registration still says 11-12. Our old system allowed us to update details, registrations had no impact on that. I cannot clear all the registrations and make them all reregister, that would be ridiculous.