I don't get why this seems like a big deal or a negative thing. Why wouldn't you want reporters to be critical? Isn't that like the whole point. That's even why we have freedom of press in the 1st amendment, so journalists can be critical.
I wish more journalists would be critical, especially where it counts (e.g. interviewing politicians). But for a top-down directive to be negative, regardless of the truth, no - that's unacceptable.