I would appeciate the ability to define an edit template (like the detail template) in the grid (for Inline or popup editing), in order to have complete control about the layout and functions. Also the usage of all controls should be possible (nested grids).
Template for grid popup edit mode is available, as you can learn from the following help article: http://docs.telerik.com/kendo-ui/api/javascript/ui/grid#configuration-editable.template For inline editing see the response in this feedback item: http://kendoui-feedback.telerik.com/forums/127393-telerik-kendo-ui-feedback/suggestions/4307159-add-a-template-for-inline-editing