Hello Anthony, As a quick update, I would like to inform you that this feature was planned from the development team and it is expected to be released with the upcoming Q3 2015.
Hello Anthony, Thank you for sharing your feedback. We will do our best to introduce it soon.
Please implement this soon. The RadWizard is effectively unusable to me until it's added. In an MVVM scenario the lack of this property causes bound properties to be set to their default values (typically null) when you navigate to another wizard page.