Currently keyboard navigation in Multiselect is a bit limited in comparison to the same functionality in Multiselect in Kendo UI for jQuery. It would be great if the shortcuts in Multiselect in Kendo for Angular matched shortcuts in Multiselect in Kendo UI for jQuery.
In Angular we want to lazy initiate the options of a multiselect. After angular loads the multiselect directive, the control does not react on changing the k-options variable. If I recall, it should be solved when the control supports the setOptions method, like Kendo UI Grid.