Basically, rescheduling things takes way more clicks than it should!
A quick way to reschedule tasks is needed - i.e. to quickly change a start and due date at the same time. I may have set a start and due date and then want to move that task +/- X Days if plans change.
This would be easy to do via the calendar if you were able to see across weeks in week view or across months in month view but you can't, you can only see one week or month at a time.
For the most part I have tasks with a start and end time on the same day, for example starting at 10:00 and finishing at 14:00 on a given day. To move a task to next monday and retain the times I currently I have to edit the due date, then the start date - each taking two or three clicks each in different places, that's 4-6 clicks just to move something to next week if I'm on my weekly calendar view which would be a common scenario for me. Furthermore the times are not retained and have to then be entered again! I mean, this is a lot of work just to reschedule a task....