The DistinctValuesLimit property is available in our R1 2018 Release.
Currently when a header value is empty the displayed text is "(blank)" regardless of the application's culture. Localize this value or allow the developer to set this value more easily. If you want to manually localize the "(blank)" text you can define a RowHeaderTemplate and ColumnHeaderTemplate (or template selector) and replace the default text with its translation. You can do that via IValueConverter. (http://docs.telerik.com/devtools/wpf/controls/radpivotgrid/styles-and-templates/templating-cells#using-custom-cell-and-header-templates)
RadPivotGrid is loading all data from OLAP Cube. It should be able to use on demand (lazy loading) pattern, so when a group is expanded, a new query is sent and only required data is taken from the server.
Implement: "% of Parent", "% of Parent Row", "% of Parent Column"
If you apply a number format to a Count value in the RadPivotGrid, then it is ignored. The reason given is that count is always an integer, so it shouldn't need formatting. However, I'd like to be able to apply group separators. It's much easier to read 100,000,000 than 100000000.
Available in LIB version 2016.2.606, it will be also available in the 2016 R2 SP1 release.
Add options for showing items with no data as in Local data provider.
add a textbox which allows users to find matching distinc values when using report filters. Very valuable if you are dealing with many distinct values.
When there are a lot of items, it is quite difficult to find the ones you need in RadPivotFieldList. There could be some way to search within the properties.
Hour, minute, second.
Available in LIB version 2015.2.914, it will be also available in the 2015 Q3.
Implement sorting by clicking on headers, like in RadGridView. Unfortunately for Telerik, Infragistics have this feature: http://help.infragistics.com/Help/Doc/WPF/2015.1/CLR4.0/html/xamPivotGrid_US_Sorting_Data.html
Available in the 2017 R1 Release (2017.1.117).
Currently the header of that column says "Grand Total" instead of the aggregate name.