I'm not up to date on the Silverman. I agree about Gunn. The Asian journalists' tweets did seem pretty out of line and, frankly, I would be fine if NYT fired her just to protect the perceived objectivity of their brand. But I only glanced into that story as well.
And, regarding free speech, regardless of the optics we are still in the golden age. The 60s and 70s may well have been the peak, but the backslide hasn't been all that meaningful. At the core of "free speech principles" is that, so long as the government is neutral, the persons lobbying corporations to fire employees for private speech are themselves exercising important political speech worthy of protection. It's the marketplace of ideas - and it's best when it's vibrant.