ok got my car back. they ran some diagnostic tests and checked for all lose joints. nothing suspicious came up.
the regional manager that came and test drove my car did pick up the noise but he considered the noise to be normal as it came up on a few other cars as well including my loaner car. by normal, he meant the car does not pose any serious or safety issues. however, the noise is not by design. he will report the noise back to the factory and hopefully they'd be able to figure something out.
at this point in time there is nothing they could do. if they hear anything from the factory, they'll get in touch with me.
looks like this issue wont be fixed for a very long time. guess im just going to have to wait patiently.