When the Name of a Report Parameter is changed, all references to it should be automatically change.

Add support for PDF Accessibility as described in the https://www.adobe.com/accessibility/pdf/pdf-accessibility-overview.html

First, we need the ability to have the controls in a Page Header Band to Grow/Shrink based on their contents.
Second, the Page Header Band also needs the ability to Grow/Shrink based the first Condition and any other Conditional Formatting settings of controls with in that band. 
This is request becuase of the design of the Report Header Band and how it is designed for Multi Column Reports.  The Report Header Band does all what I am asking for, however, in a Multi Column Report, it's only the size of the column width, which is a problem for some of our reports.  We need it to be the entire page width.  Some suggests to create PAGE BOOKS seems a bit complicated to do for such a simple request.  I have been using different report writes in my 25+ years of programming, and Telerik Reports is the first one that I have used, that has these limitations..

When a report contains data item bound to big amount of data, it takes time to export in CSV format due to data denormalization.
This would be a performance improvement for big data reports. 

Add intelligent code completion in the Report Designers Expression editor to improve the editor usability and user experience.

Currently, the WebSeviceDataSource is making separate request whenever data is required, consider adding a caching mechanism to reduce the number of the web requests.

One of the main features the clients require when exporting the reports to XLS or XLSX is to have the page width already set to 1 page. But for none of these exporting options, this is possible, unless you intercept somehow the export functionality prior to rendering the document to the client

I'm trying to learn more about your reporting tool, but your demo only shows me a blank page. 
https://demos.telerik.com/reporting/dashboard?&skinName=default

Please consider adding an RTF Text Box control to your report toolbar.   Crystal reports has this ability which we've used on many of our reports.  Currently the only work around for changing the RTF data to something that Telerik Reports will print cleanly, is to create a user defined custom function.

Provide a component which wraps the HTML5 Report Viewer for use in a Vue.js application. The HTML5 Report Viewer is built using Kendo UI for JQuery components. So, one can consider the approach covered here: https://laravel-news.com/vue-wrapper-component

It would be very useful to have the option of changing Sort and Toggle Visibility icons for example to a vector image. Default png is not looking good when the report is scaled or in specific styles.
Attached an example.

I reported this behavior earlier in a support ticket over two years ago but since it has not been addressed, I would try this approach.

If an AreaSeries has the LineType set to LineTypes.Smooth, the graph series may become misleading or incorrect. Consider the attached screenshot (withoutsettings.png) showing a simple 10 point chart. Looking at the chart, you would assume that between 11:06 and 11:07, the response time was below 0. However the test values indicate that the values never were below 0. This makes the chart  misleading and incorrect. It then makes the chart unreliable to the end user, thus unusable. The quick workaround is to set the LineType=straight but since you support a smooth linetype, it should be correct. Another, more serious, instance in the chart where (using smooth LineType) is where the series line will cross the  x axis point (a timeline chart) more than 1 time which is actually a timeline chart violation. (attached file AreaSmooth2.png) .

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

Please make the text boxes in the report actually resize and grow to the correct height.  There is a catastrophic bug currently which causes the text box to stay at a single line and will not show the entire paragraph of text.

This can happen 5% of the time leading to a very unreliable framework which cannot be used in a production environment.

Currently there is no way to implement a table with html. It is pretty clear from the 1 ticket already open that this is not going to be done as it has been open for ~4 years at this point. Due to implementation challenge of the task, I suggest allowing for a HtmlTextBox to take the place of a TextBox in the table object. This will allow for better conditional formatting in a table, without having to implement the entire table function of Html.

I understand that for most users, relative URLs don't make a lot of sense in reports.
However, we want export our report to PDF and link to other PDF files *in the same directory*.
As everything will be distributed as a ZIP file, we cannot know the absolute file path.
It should be easy to support this as this is supported by PDF out of the box.
Apparently, somewhere in the Reporting code, you remove URLs if they are not absolute. Just remove that check, let us put whatever we like in the hyperlinks.
Thanks.

alot modern apps will be using uwp would be nice if we could use reporting with it

Ability to localize Standalone Report Designer created reports without the need of using custom functions.

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.

I have a report that has dynamically created html text based on the data. I would like to have a footnote associated with one of those HtmlTextBox controls to appear at the bottom of the page on which the section occurs.
Please see a ticket "How to create a report footnote"  https://www.telerik.com/forums/how-to-create-a-report-footnote

Thank you.