The CommandArgument value of RadButton is not available in the ClientClicking eventargs of RadButton. The get_commandName() method of the event arguments always returns null.
The issue is introduced in Q1 2016 release.
Steps to reproduce:
Run the following code and click the button.
    <script type="text/javascript">
        function btnEdit_Clicking(sender, eventArgs) {
            alert(eventArgs.get_commandArgument());
        }
    </script>
    <telerik:RadButton ID="RadButton2" AutoPostBack="false"
        runat="server" Text="Click Me"
        OnClientClicking="btnEdit_Clicking"
        CommandArgument="Name">
    </telerik:RadButton>
			It would be nice to have a CardView type panel control. This could simply be a dezoned raddock control that is optionally missing the header. I am using some custom CSS for this now so that when the mouse moves over the div the shadow deepens to indicate selection. It would be nice to adjust the elevation as well. You can kind of get this now but taking a radwindow or a raddock but a dedicated control would be nice.
IE browser handles backspaces at some extent, but causes undesired HTML formatting when the entire UL|OL is wrapped in another DOM element. 
RadEditor can reuse the DeleteCommand implementation in order to bypass browser's behavior and give more reliable results.
The following override can show you how you can handle this on your own and correct the browser result (Note that the script should be loaded after the RadEditor scripts in order to work):
<telerik:RadEditor runat="server" ID="RadEditor1">
    <Content>
            <div>
                <ul>
                    <li>Purple</li>
                    <li></li>
                </ul>
            </div>
    </Content>
</telerik:RadEditor>
<script>
    var originalApplyFix = Telerik.Web.UI.Editor.DeleteFix.prototype.applyFix;
    Telerik.Web.UI.Editor.DeleteFix.prototype.applyFix = function (e) {
        var that = this;
        var $E = Telerik.Web.UI.Editor;
        var utils = $E.Utils;
        var range = that._getRange();
        
        originalApplyFix.call(that, e);
        if (Telerik.Web.Browser.ie) {
            var startContainer = range.startContainer;
            if (utils.isTag(startContainer, "li") && utils.isEmptyDom(startContainer) && !startContainer.nextElementSibling) {
                var outdent = new $E.OutdentCommand(that.editor);
                outdent.onExecute();
                $telerik.preventDefault(e);
            }
        }
    };
</script>
			When the user selects all the content and changes the font family through the FontName command, the chosen value does not remain as the selected one. The issue is most prominent in Firefox, but could be reproduced in Chrome with a subsequent select all.
AllowSpecialTags should retain special tags like script and iframe. However, enabling it escapes the tags, but they are never restored. Workaround: SharePoint 2013 allows iframe tags to be saved in the content, so the AllowSpecialTags can be safely removed. <telerik:RadHtmlField id="content" FieldName="PublishingPageContent" runat="server" AllowScripts="true"/>
An existing control looks like http://demos.devexpress.com/ASPxImageAndDataNavigationDemos/NewsControl/DataBinding.aspx Where this control would allow you to express the UI of the aggregated feed data, where as the feeds from RSS or LinkedIn, YouTube etc can be sorted, grouped, stared or shared. So ideally feeds can be added at run time. Personal settings could be saved using existing tooling. The ideal solution would allow the end user to customize their feeds. Ideally it would degrade well onto a mobile interface so you can flick thru all the feeds, flick to the left or right to dismiss or save. This is a bit more KendoUI
Please add an ability to move text in different styles, something like HTML MARQUEE. For example: http://www.htmlcodetutorial.com/_MARQUEE_BEHAVIOR.html http://www.plus2net.com/html_tutorial/html_marquee_behvr.php
It would be helpful , if you provide image library like Visual Studio provides. The image library can have all the standard and specific icons of telerik.
The DragAndDrop functionality of the RadAsyncUpload under Edge, works properly if DropZones property of the control is set.
When you enable the control's keyboard navigation, using the arrow keys for navigation does not work when you use NVDA screen reader.