Add more flexible reminder time options.
Instead of the two sets available now , make it (optional) more flexible with a text field.
remind 2 times with 30 seconds between reminders.
remind 5 times with 5 minutes between reminders.
remind 2 times with 1 hour between reminders.
I saw a very flexible reminder management in the app Calendar Event Reminder... but to be honest at the moment I don't remeber the exact implementation. All I remember is that before uninstalling it I thought "this kind of reminder management is what I miss in my favourite app (Calendar Snooze, of course).
P.S.: another option I miss is the possibility to add a custom alert to an event (a Calendar Snooze managed reminder, I mean, not editing the original event to add a reminder in the calendar)