Thanks for your feedback.
Generally speaking, RadMenu is not a good replacement for a ContextMenu. It seems like you need the latter. Unfortunately, we do not provide such control for the time being. We are, however, investigating the matter and once we find the best way to implement the control, we will surely do. Considering the complexity of the task, we cannot set a certain timeframe on when this will be available at our side.
We will greatly appreciate any further feedback of yours regarding the ContrextMenu control. This is always the best way to improve the quality of our products.
the Telerik team