Is reflection of properties supported in the 2013 api. In 2011 I would use refelction to get the value of properties from objects via a generic method. However in 2013 the properties aren't being reflected anymore. For instance the WorkAxis object only has a Visible property refelected.
Has something changed with the members of the types in .NET?
We generate the interop the same way as we always have. What has changed is that we're using .Net Framework 4 to generate it. Is your project using .Net Framework 4? If it is, then possibly the .Net utility that builds the interop has changed.