customisable date slicer hierarchy

Great news on the new date slicer. However I think it has a long way to go. I think that a good goal is to make it look as close to the Excel date slicer as possible from a feature perspective.

One feature I think it is missing is that it should allow us to use a date hierarchy in it, AND IT MUST BE CUSTOMISABLE.

For instance, we might want users to start specifying full years, then perhaps quarters, months or weeks . But most importantly, and I say that again, we must be able to specify a custom hierarchy based on our own date tables, and not some built-in hierarchy options that Microsoft thinks that it is best. For example:

* Users might want the hierarchy to be: YEAR, QUARTER, MONTHS or perhaps only YEAR and WEEK.

* Users might have their own custom period range from a custom date table they might wish to use. So, again, this must be customisable.