Trello vs. Planner - whats missing in Planner and what would make it better than Trello

Mike Curtis 

I would simply like to see the date fields be datetimestamp along with the addition of a field called "Completion Date" (also datetimestamp)

Planner is simple enough for a business team to utilize and a technical team to manage work but for auditing time spent for budgetary purposes it lacks this one field.