It would be extremely nice if the "Insert Video" was added to the Editor. I know there are "hacks" and workarounds that make this possible, but it just doesn't have the right feeling to it. The editor in WordPress gives plenty more options to insert a video, and it's easier to use than the hacks/workarounds.

The current Grid / Editor combo don't work together, making it nearly impossible to use the Editor inside a Grid. It may be possible, but that requires [AllowHtml] atribute on the model, which is a security concern.
More details:
http://www.telerik.com/forums/kendo-editor-in-a-grid-popup-editor

Add the possibility to stop a user from deleting an image/folder in the ImageBrowser connected to the Editor. As it is now you can stop it serverside, but there is no way to prevent the folder/file to from being removed on the client.

There are a number of controls missing from the new editor that was not in the old telerik editor. including Add spell check, cut, copy and paste {several options}, undo, redo, new paragraph, horizontal rules, insert time, insert symbol. Anyway to bring those functionalities into  ASP.net core?

Add an enable() method to Editor to enable/disable the editor widget.

The following link mentions how to disable the contenteditable, but this does not disable the toolbar: http://www.telerik.com/forums/disable-readonly-and-maxlength-for-kendoeditor

Something like:

function(enable) { 
                        $(this.body).attr("contenteditable", enable);
                        if (enable) {
                            this.toolbar.element.closest(".k-editor-toolbar-wrap").find(".k-disabled-overlay").remove();
                        } else {
                            this.toolbar.element.closest(".k-editor-toolbar-wrap").append("<div class='k-disabled-overlay'></div>");
                        }
                    }

Would be nice for the Editor content to be centered so it appears professional in Corporate announcements

In the editor, the image manager search should search the current folder and any folders underneath it and return all matching images. Currently it only searches the current directory.

We'd like to give users the ability to insert hyperlinks in the editor. 

We have the restriction that instead of the default Kendo insert link dialog, we need to show a custom dialog. We effectively limit what the user is allowed to link to (a set of internal documents).

There's no easy way to achieve this functionality with the current API. We had to extend the create link tool ourselves to support this.

Thanks.

If you provide any editor control which render both OpnXml data as well as Html data, that will more helpfull for us.
OR
any convert method in kendo UI editor which convert OpenXml to Html and vise versa.

It would be helpful to have backend server support for node.js (express) for the  image manager API.   Perhaps it could be started in Kendo Labs as a joint community effort.  
Also,  the API needs to be tuned to support the everlive URI hooks.  While not go ahead and create and image content type with the API on the everlive side that talks to the editor image API.

it would be very nice if it can keep the original format including the color, size, indent, bullet and even image.

Add an option to set the RTE to be read only.  This is helpful when integrating the capability with databases that have records that may be in a "locked" state.

HTML5 now supports ruby annotations with the <ruby> tag set.  The Kendo editor should be updated to allow entering and rendering ruby as well as a feature to support vertical text with ruby as some languages should be displayed.

Lots of forums use bbcode and adding support for this to the Editor would be great.

Such that it looks like:
a) jdkfjdk fdkfj dkjf dfkjdf kjf
b) djfkdjfk df dkf dkfjdkfjdkf dkfjd
c) kdj fkdjfk djfkjd fkj fkfj

Word does this and it is useful. Uppercase and Lowercase options would be useful too.

The colour picker palette should be capable of accepting name value pairs. This way, the colours can be named or given a hint which shows as a tooltip to help users choose which colour to use. Very helpful when we allow users to create a list of colours which could be subtly different and only a hint would easily differentiate them.

Currently you can only set the width as a pixel value. I have users who would like to set the width as a percentage value. 

When the cursor is inside a table cell, typing the TAB key should move the cursor to the next table cell (moving left to right, top to bottom).