We have just pushed the official bits for 5.0.1 to NuGet and should be releasing an updated MSI sometime within the next week. Thanks to feedback from the community we found and fixed several bugs, detailed below.
Added configuration setting to ODataLib to allow users to intercept the XML reader before ODataLib processes the payload
Fixes bug where DateTime values do not roundtrip properly in JSON verbose
Fixes bug where $metadata requests fail on services with both actions and service operations
Fixes bug where $expand requests fail on Oracle providers
Fixes bug where vocabulary annotations in an external annotations file fail to resolve the target
What does the MSI do?