Some Feedback I gave to @omni today:
Just as you are allowed to NOT have a due or defer date, when you do have one of those, I wish you did NOT have to specify a due/defer time. Most of my tasks only have a time included as a result of there not being an option to remove this.
This would be in line (IMHO) with the progressive disclosure introduced with OF 3. The result of having to include a time in my tasks results in artificially interleaving tasks amongst my calendar appointments in the Forecast view. Removing the necessity to include a due/defer time would correct this.