Big SPA projects need to have an architecture for the code, some structure. Current examples for SPA are suitable for small apps, so some docs/examples/guidelines for bigger projects would be useful.

I would suggest to enter the function menu script that is described in the following link. This is an interesting application that really makes it easy to navigate the menus user an.

http://bjk5.com/post/44698559168/breaking-down-amazons-mega-dropdown

When creating a multilingual website I've realized, non-English unicode characters are not supported by the Grid's toolbar buttons. The toolbar won't be created and the Grid's setup cancelled. So, also no read function called or anything else.
Strangely it also killed the functionality of my Razor DropDownList for language selection despite no connection other than both using JavaScript.

Suppose a model is defined with settings for editable, required, validation, etc. Then this model is used a datasource's schema.

Instances of the datasource's data will be models. However, if a model is bound to some HTML view, it's settings are not applied to the view. All settings have to be manually applied to the HTML elements.

I suggest that these settings are applied automatically. Then for example, a field's property like "required" wouldn't have to be coded at two different places.

signalR gives the possibility to quasi direct connection to the server side with easy parameter passing and easy implementation.

Bubble count on mobile list view like jquery mobile

Possibility to add filters to hierarchical datasource, that execute recursively.
Use case: In TreeView we need to search for some element text, we need to see elements that contain some text and their parents expanded. Filtering could be usefull here.

Ability to have a hidden menu that slides in or pops in much like the other apps and frameworks have.

Currently templates are only supported when the DropDownList is in an open state. Ideally, the DropDownList should have the ability to display a template when in a closed (selected) state as well.

A common use case is to display icons next to the dataTextField. However in it's current state, when an item is selected the icon is no longer able to be displayed.

add delay parameter in miliseconds for the kendo.ui.progress so you don't see your container blinking if your ajax calls are fast.

Although Kendo has fency filters with different operators (StartsWith, Contains) on different columns based on data type, Most business users like to have excel AutoFilter(Multi select checkbox) where they can choose what companies, countries they want to see

You can see a live demo here at - select company, country or any other column.
http://demos.devexpress.com/MVC/GridView/Filtering

Add Min Width Property to Grid Column so that a user can't manually shrink a column beyond a certain width.

Menu - set item highlighted when clicked
Example: If I click HOME I want home remain highlighted, if I click another item set this item highlighted

Add MVVM support for PanelBar, so sections can be added dynamicaly from ViewModel. Currently no MVVM support exists for PanelBar, but there is already MVVM support implemented for TreeView (both of them use hierarchical datasource).

The editor should be able to paste text from word 1:1. Currently it's not working wekk,

Have a look at this post in your support forum: http://www.kendoui.com/forums/ui/editor/copy-text-from-office-to-editor.aspx

I've downloded a free Kendo UI Trial. Unfortunately there aren't StockData.mdf in Template project. Can you fix this issue? I'm choosing component base for our company and it realy prevents me.

If a Kendo-Grid is set with .Scrollable(true) the height of the grid get a style with "height:200px;". This seems to be unchangeable without edit the Kendo Source code. But in my opinion this is somehow needed. Of cource it could be changed later with some javascript code but why so intricate? It would be much more efficient to "change" the css i want on the fly.
E.g.
.ScrollableStyle(new { @class = "max-height:300px;" })

KendoUI MVC Serverside wrappers should allow exporting grid data to PDF, Excel and CSV. While this has been asked for before, what I am asking is that this feature be part of the KendoUI complete with server side wrappers so that this is no longer just a limitation with the client-side framework. Every business application we have with grids requires the ability to export in PDF, Excel and CSV formats.