I do think he's done important things for both the image and stability of the club, and I think speaking out strongly against the injustice Juve has suffered is a big part of that. I think that a lot of people view Juventus more favorably than they did before his arrival, largely because he's helped push for the Calciopoli review (which clearly demonstrated Juventus was unequally punished, and that the FIGC sports tribunal is a complete joke.).
How do you measure it tangibly? Hard to do. Can't give him credit for Bonucci or Pepe getting acquitted, but Agnelli was certainly in their corner. That has benefits for the unity of the squad, you can bet your ass the players appreciate him speaking out and showing support. Exact same thing with Conte now, clearly.
Btw, what kind of benefits are you looking for when the appeal process is still underway? It's not like he can change a corrupt, national institution by snapping his fingers. He's putting a TON of pressure on those engaged in the process, and by bringing considerable attention to this, it does provide the opportunity for others to take up the charge; for instance, the other day I heard Zamparini critiquing the process. Hopefully, down the road, this might even help facilitate some change in the FIGC tribunal process... a bit idyllic maybe, but corrupt governance can be stopped.
I'd much rather he be strong, assertive, and speak his mind, than quietly bend over and take it in the ass. If you're endorsing silence from the primary spokesperson of our club, what do you think that will accomplish?
Other than the perception that we're bending over, and taking one in the brown eye?