I've done some Powershell work in my brief time as a Windows sys-admin. I personally struggled with it. The object interaction can be complex and the naming feels less scriptable and more directly out of the C# world.

That being said, I can see the appeal and I know people who love it. I have seen some amazing shit written in it, like this security tool that was just open sourced this year:

https://github.com/adaptivethreat/bloodhound

I have used Mono/GTK# for years on Linux and prefer it over other GTK wrappers. Powershell might be worth a try on Linux, but it will take time to build up the libraries and wrapper needed to interface with most of the Linux subsystems (unless Microsoft as ported a lot of useful stuff in this initial release).

People don't (or shouldn't) use bash/zsh/fish for really complicated stuff anyway. I have a feeling most sys admins/devops people will continue to use Python/Ruby for complicated tasks; and they both have a ton of libraries that help avoid the stdin/out/parsing situation you have with chaining together regular shell scripts.