Custom Reports Custom Fields Sorting

I've noticed that in the new custom report layout, when selecting to include "Custom Fields" I am now only able to select parameters based on the Custom Fields structure already in place. For example, if the Custom Field is a date field, then I now have to select from the pre-populated date ranges or create a custom date range, whereas I used to also be able to select "Is Blank", or "Is Not Blank". Similarly, in Custom Fields with Drop Down menus, I am restricted to the pre-populated selections or "Is Blank"/"Is Not Blank" whereas I used to also be able to filter by "Contains"/"Does Not Contain". I found these fields useful for the greater reporting range they provided and I would love to see them back.