Yes, I think it is a "good thing" as a demonstration of the power that the pro gun, pro second amendment group has when they are united.
I also think that is a bad thing when a prominent, senior member of the shooting press harbors beliefs like Jim Zumbo. I'm not sure if I believe him when he pleads ignorance of black rifles in varmint hunting. I know he has to be aware of the incredible strides in range and accuracy made by black rifles service competition. No one in the shooting/hunting fraternity could be ignorant of the divide and conquer tactics of the anti-gun crowd or the firestorm that surrounded Bill Ruger's proposal to limit magazine capacity or Smith & Wesson's agreement with the anti-gun forces.
As people like Carolyn McCarthy sponsor another Assault Weapons ban more onerous than the first, maybe the "moderates" and the RINOs will look at the Zumbo incident and think twice about voting for more restrictions on law abiding citizens which is what the AWB really is.
Maybe Zumbo can write a second chapter in this story. Hopefully, it will be one of redemption. And for all those apologists out there who defended Zumbo, watch out! And that goes double for you Petzal.