I noticed a potential improvement when deleting a reminder note from a note line.
If the reminder is deleted by the reminder user interface that pops up when selecting the reminder icon in Agenda, the reminder is deleted from Apple Reminders app and in Agenda right hand side-out calendar/event list as expected.
If the Agenda reminder is deleted by using back space the reminder remains in the Agenda right hand side-out calendar/event list and the Apple Reminder app.
Would be useful if a reminder in agenda is deleted by back space it also deletes the reminder from Apple Reminders app and the Agenda slide-out.
I am running IOS 13 beta.