The only thing a crew id gets you is entry without a boarding pass. If you experience an issue with this ask that supervisor call the TSOC for clarification.
A uniform allows crew screening. No scanner, shoes on, liquids in.
That is national policy if you experience anything less harsh good for you but don’t expect it.
My advice bring a sports coat. Looks good and hides the uniform for jumpseating but allows the uniform for TSA.