Yes, I am not using MyDay at all. It could be a neat feature, but I don’t have the luxury to spend half an hour in the morning planning my day every day, and I am not going to use it at all if I can only use it sometimes. I use Stars for this (which is not ideal either because they are tied to Outlook priority).
Reminders are necessary if you are on the move a lot throughout the day. Some days are just busier than others. I’d rather have reminders automatically adjust to the due date changes, and manually change back the few ones which I want to be reminded of on a particular day regardless of change in the due day, then the other way around (having the due date move by a week yet the reminder is still set too early).
However, my single biggest issue is the default sort by creation date in tag filter view. It takes away so much functionality that could be extremely useful had it been implemented right. I can’t even fathom who would even think of this, it’s almost like a stick twisted joke.