Interactive sorting would really help the HTML5 based report viewer hold it's own against SSRS.

It would be good a maintain the scroll position on the parent page while navigating back from a drill-through report (using the back button of the report viewer) specially if the parent page contains a vertical scrollbar. This would enhance the user experience and eliminate the need to scroll back to the original position.

Add Right to left attribute to the three levels of the reports, with default 'inherited' of child levels:
Level 1: The report document
Level 2: Report Section
Level 3: All type of object and controls including Table/CrossTable

We often receive feedback regarding hard/impossible editing of reports after they are exported to Word format.
The existing rendering mechanism will produce Word tables which are harder for manual editing - http://docs.telerik.com/reporting/designing-reports-considerations-word

Let us know in comments about your experience with editing reports exported to Word format so we can understand more clearly what is required from Reporting Word rendering extention.

It would be very helpful for us people that have been using Telerik Reporting in Silverlight (or WPF) applications to have access to a Report Viewer for Windows Store Apps (XAML).  The future of Silverlight is unclear at least and there are many Line Of Business Applications currently running under Silverlight and I know of many developers that are looking to port their LOB apps to Windows Store Apps (or Universal Apps).  The current HTML5 Report Viewer does not provide printing when it is implemented in browser window in Windows Store Apps so we cannot really offer this option to our customers.

Optimize the Telerik Reporting performance by parallelizing the reporting paging and rendering. Better utilize CPUs with multiple cores and as a result, improve the REST Service throughput and decrease the viewers' rendering times.

Currently, when you set SplitWorksheetOnPageBreak to True, the Excel Sheet name is formed from the DocumentName or ReportName and the number of the page.

It would be very helpful if the report authors can manipulate these names with Expressions.

Allowing custom actions would greatly increase the power and flexibility of reports and the report viewer.  While the current set of actions provide great functionality, they are still somewhat limited in scope.  If actions were able to handle their own execution instead of having the individual report viewer implementations handle their execution, customers could enhance the functionality as they see fit.

We display data inside an HtmlTextBox that was entered using the RadEditor.  It would be great if the Reporting HtmlTextBox could be brought much closer or even in line with tag support as the editor.  We are frequently running into issues with uncommon tags (that we strip out for the HtmlTextBox) and also with spacing being different.  We work around the issues we have, but continuing increased tag support or auto stripping of unsupported tags would be very appreciated.

Currently Telerik Reporting team like only a single developer hard working. So slow..... I even doubt there is no one here.
I hope hire more developer for Telerik Reporing team, and speed up. 
Or maybe Telerik Company even don't care "Telerik Reporting".  If that's true, please just close the project. Let us find another company request new feature and bug report who really care the customer.

Look it here. non finish request and problem already a hundred, even some request submit almost a year ago . But only 1 in development.
That's really not respect customer like us who really support The Telerik.

Please add the ability to specify the graph series colours dynamically via binding expressions instead of hardcoding predefined values in palette or conditional formatting. 
lineSeries.Style.LineColor = "= Fields.HexColour";

To have a better performance would be nice to cancel report rendering automatically or manually. 
If I am asking for a big report and after I change parameters and request new report, the previous request is still in progress and it is not going to be cancelled. Therefore I see high memory consumption on continuously refreshing a reports with a big data and after some time I see complete slow down of the Reporting Service and of course slow down of the server itself. The memory in this case is not released and Reporting Service crashes sometimes.

as Microsoft is going into Power Bi it is worth to take over SQL Server Reports possible to convert to Telerik Reporting

Hello,

It would be nice if telerik reporting get a option tool which our customer can digitally sign a PDF generated from the telerik report.

This feature ll be great for the contract , important customer document, to sign in by the web.

thanks
Oliver

The Telerik Reporting only support fixed size page now.
But sometimes we need continues-roll paper mode.(like: receipt paper)

Some reporter tools: ActiveReports, it has 3 mode:(Page Reports,  RDL Reports,  Section Reports)

On "Telerik Forums / Reporting Forum" there is already some people asked it before 2 years ago. But until now the basic feature not release....

Add progress bar that indicates when the report would be fully rendered.

able to modify the line spacing in paragraph

This function would allow you to lookup a value from another data source with a value that is in your current data source.  It would return the first matching value for the specified name from a data source that contains name/value pairs.

This would allow the porting of many SSRS reports over to Telerik Reporting.

Example: 

I have a report which lists all sales staff in our firm, with other personal information. We have a multi-dimensional data source (Cube) where we have all the financial data stored and calculated. 

If I wanted to retrieve the total sales and total revenue that each member of the sales staff had, it would require me to use a sub-report to load the data (using a parameter to pass the staff member's unique ID).  

This causes the loading/generating of the report to take longer, as the query against the Cube has to happen for each member of the sales staff, because of the use of a sub-report. With this new LOOKUP() function, it would allow the data source to be loaded and the report would be able to lookup the sales and revenue values for each staff member ID.

Generate and distribute packages built against .Net 5.0.

Currently .Net 5.0 RC1 and .Net 5.0 RC2 are announced. The official version has been announced on 10th of November.

Please, add support for other Kendo themes in the Web Report Designer.