What are people doing these days by way of Powershell task directly into WEM - for example to do mass changes or updates via SDK I know Arjan/Kindo had some powershell modules for older versions of WEM but might not work on later versions?

the public API/SDK is supported in latest version.

Does this also work in WEM Service?

yes, works.

any idea or official documentation on how to connect to wem service via powershell? thanks 🙂