We'll see. People are really p.o.'d at his style; his style might not change, but this response clearly signals his intent to take what actions he can take.
I'll add this (and the "Kraft-is-gutless" folks will be happy): He'll weigh cost and risk versus benefit in any action he does pursue.
What he's signaled here is that he's examining actions he can take in response.
He could have written "We will fight the NFL on the beaches, we will fight them in the fields, we will fight them in the streets" or he could have written a stream of angry invective, if you're more a WWE guy than a Churchill guy... but for all you "weak sauce" folks who simultaneously are saying "words words words we want action..."
What he's doing seems to be to allow him to take actions he deems appropriate and for the good of the team.
Whether it makes us angry, happy, whatever is one part of the calculation. But if he sees nothing in acting other than further future downside, he ain't doin' it. If there's a good shot of getting results, he will. That's how I read this guy.