Perhaps you can comment on what this upgrade broke and how to fix it? For example, the iOS Reminders service on IFTTT is broken. You can no longer use reminder creation or completion as triggers and you can no longer (in a completely automated fashion) create reminders (reminders aren't created until you launch the IFTTT app).
Plus, there's still the issue of not having a truly recurring location based reminder. You either have to leave them incomplete so they fire again and you can't keep track of their completion, or you have to complete and "un-complete" them.
Also, the display of due tasks annoyingly differs between location and time-based reminders.
Not to mention that the update introduced a bug where scrolling gets mis-interpreted frequently as a title edit attempt now. 10% of the time, I'm just trying to scroll and the keyboard comes up.
And Siri is much more finicky about reminder wording. I try to create reminders using Siri and I either get told reminders doesn't support that (even though it created the reminder) or it shows me a reminder containing only the first half of the title or words completely dropped out of the middle of the reminder.
Obviously, I use the reminders app all the time and this "upgrade" is annoying as hell. They shouldn't have released it with all these bugs. I preferred the more smoothly running and less buggy iOS 12 version.