Expose property controlling the RibbonGroups Header Background

Allow ApplicationMenu to be editable in Blend. Make sure when clickon the application button the app menu is displayed in blend. Also add panels for the content and footer content for easier content adding.

The MinimizedPopup could be open/closed by using the SelectedIndex property of the RadRibbonView.

A sample implementation could be seen in the attached project.

Add a property to show/hide RibbonWindow Close/Minimize/Restore buttons panel

Add ScreenTip for the Application Button

UPDATE: RibbonView ApplicationButtonStyle property  can be used to apply a style on the ApplicationButton. Use the style to apply a ScreenTip on the button.

Add support for direct content of ribbon buttons (like using XAML vector graphics instead of images).

Add panel element to the TabStripAdditionalContent property. This way it will be easier for the users to add content.

Declined: The existing API for the TabStripAdditionalContent property (of type Object) easily allows the users to customize and insert content depending on their requirements. For instance if you want to use data from ViewModel and list all of its Items you could use the following code:
<telerik:RadRibbonView.TabStripAdditionalContent>
	<ItemsControl ItemsSource="{}" >
		<ItemsControl.ItemsPanel>
			<ItemsPanelTemplate>
				<StackPanel Orientation="Horizontal" />
			</ItemsPanelTemplate>
		</ItemsControl.ItemsPanel>
	</ItemsControl>
</telerik:RadRibbonView.TabStripAdditionalContent>

Implement DirectionalNavigation

Allow changing the entire UpDownButton tooltip.

Allow hiding the tab headers - when a single tab is displayed a tab header is not needed and it can be programmatically hidden in order to save space.

UPDATE: HeaderVisibility property can be used to achieve this behavior

Allow RibbonWindow Minimize/Maximize/Close buttns to work in in-browser scenarios

Allow the ApplicationMenu to be used as a stand-alone control



Available in R1 2017 Release

Allow the QAT context menu to be extended

ApplicationMenu do not have keyboard navigation - pressing arrows do not navigate thru the application menu items.
Declined as a duplicate of: https://feedback.telerik.com/wpf/1352753-ribbonview-applicationmenu-do-not-have-keyboard-navigation.

Expose properties to control the BackstageItem.Icon size

Any group or button can be right clicked and added to the Quick Access Toolbar (QAT).

Make Buttons' Image properties of Object type.

Make the gallery resizable

Currently, Title and Description properties are typed to string and the control template uses TextBlock controls to display these properties, I think that only typing these properties to "object", showing them with  ContentPresenters and adding a pair of DataTemplate Dependency properties (TitleTemplate and DescriptionTemplate) would offer an extremely flexibility to this useful control.

Declined: If the users need to transfer object data to the ScreenTip they could use the Tag property(http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.tag%28v=vs.110%29.aspx)  and bind its value to an custom Implicit style targeting the ScreenTip. 

QAT should have overflow